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Grade& 10:& Revision& Package& Topics&&

&Revision& for&Math& Studies& SL&

1&

!!!!!!!!

Grade 10 Revision for IB DP Math Studies SL

!!!!!Instructions:!Read!carefully!&These& are& the& prior& learning& topics& that& you& should& have&mastered& prior& to& starting&Mathematics&SL/HL.& Please&make& sure& to& show& all& your&working&out.&Write& your& final& answer& in& the& box. &&&&&&&&&&&*Give& all& answers& either& as& an& exact& value& or& correct& to& 3& significant& figures& unless& stated& otherwise. &&&

Grade& 10:& Revision& Package& Topics&&

&Revision& for&Math& Studies& SL&

2&

Numbers& Algebra&•! Forms&of&numbers:&integers,&fractions,&decimals,&

exponents,&absolute&value,&standard&form&(scientific&notation),&recurring&decimals&and&surds/radicals&

•! The&four&number&operations&(addition,&subtraction,&multiplication&and&division)&using&integers,&decimals&and&fractions,&including&order&of&operations&

•! Simplification&of&expressions&involving&surds&(roots&or&radicals),&including&rationalizing&the&denominator&

•! Calculate&squares,&square&roots,&cubes&and&cube&roots&of&numbers.&&

•! Prime&numbers&and&factors,&including&greatest&common&factor&and&least&common&multiple&

•! Integer,&Fractional&and&Negative&exponents/indices&•! Number&lines&•! Order&quantities&by&magnitude&and&demonstrate&

familiarity&with&the&symbols&=,≈,≤,≥,<,>,&•! Make&estimates&of&numbers,&quantities&and&lengths,&

give&approximations&to&specified&numbers&of&significant&figures&and&decimal&places&and&round&off&answers&to&reasonable&accuracy&in&the&context&of&a&given&problem.&&

•! Units&of&measurement&•! Ratio,&percentage;&direct&and&inverse&proportion&

Sets&and&Numbers&•! Number&systems:&set&of&positive&integers&and&zero&

(N),&integers&(Z),&rational&numbers&(Q),&irrational&numbers&(Q’),&and&real&numbers&(R)&

•! Concept&of&notation&of&sets,&elements,&universal&(()&(reference&set,&empty&(null)&set,&complement,&subset,&equality&of&sets,&disjoint&sets,&Operations&on&sets;&union&and&intersection.&Communitive,&associative&and&distributive&properties.&&

•! Venn&Diagrams&•! Number&sequences&

•! Addition,&subtraction,&multiplication&and&division&of&algebraic&terms&

•! Manipulation&of&linear&and&quadratic&expressions,&including&factorization,&expansion,&and&the&use&of&the&formula&

•! Linear&functions,&their&graphs,&gradients&and&y]intercept&&•! Algebraic&fractions&&•! Integer&and&fractional&exponents&(including&negative&

number&exponents)&•! Patterns&and&sequences&•! Algorithms&•! Functions&

•! Types&of&functions:&linear,&quadratic,&exponential,&sine&and&cosine&

•! Domain&and&range&•! Transformations&•! Composite&Functions&

•! Equations:&•! Linear&•! Quadratic&•! Simultaneous&

•! Solving&Inequalities&in&one&variable&or&quadratic&equations&•! Arithmetic&and&geometric&series&•! Algebraic&Fractions&•! Simultaneous&Equations&&

Geometry& && Trigonometry& Statistics&and&Probability&•! Geometrical&elements&and&their&classification&•! Perimeter&and&area&of&plane&figures.&Properties&of&triangles&

and&quadrilaterals,&including&parallelograms,&rhombuses,&rectangles,&squares,&kites&and&trapeziums&(trapezoids);&compound&shapes.&&

•! Volumes&of&prisms,&pyramids,&spheres,&cylinders&&&cones.&•! Distance&•! Angle&properties&and&measurement&in&degrees.&&•! Compass&directions&and&three&figure&bearings.&&•! Right]angle&trigonometry.&&•! Simple&applications&for&solving&triangles.&&•! Pythagoras’&theorem&and&its&converse.&&•! The&Cartesian&plane&•! Simple&transformations,&translation,&reflection,&rotation,&

enlargement.&&•! Congruence&and&similarity,&including&the&concept&of&scale&

factor&of&an&enlargement.&&•! The&circle,&its&centre&and&radius,&area&and&circumference.&

The&terms&“arc”,&“sector”,&“chord”,&“tangent”&and&“segment”.&&

•! Circle&geometry&•! Three]dimensional&coordinate&geometry&&•! Sine&and&cosine&rules&*&•! The&unit&circle&*&

•! Graphical&analysis&and&representation&(pie&charts,&histograms,&line&graphs,&scatter&plots,&box]and]whisker&plots)&

•! Population&sampling&•! Measures&of&central&tendency/location&(mean,&mode,&

median,&quartile,&percentile)&for&discrete&and&continuous&data&

•! Measures&of&dispersion&(range,&interquartile&range)&for&discrete&and&continuous&data&

•! Probability&of&an&event&•! Probability&of&independent,&mutually&exclusive&and&

combined&events&•! Probability&of&successive&trials&•! Standard&deviation&*&•! Conditional&probability&*&

Grade& 10:& Revision& Package& Topics&&

&Revision& for&Math& Studies& SL&

3&

Key!Formulae!!

!

!

!

!

Number& Sense&&

&Revision& for&Math& Studies& SL&

4&

SECTION!1:!Number!Sense!&Calculate:&&1. ! −5 × 5 − (−8) × 2&

&&&&&&&

2. ! 2 + 3(2 − 20 ÷ 24)4 − (54 + 3) ÷ 2&&&&

&&&&&

Decimals& && Fractions&&3. ! Write& as& decimals. &

&&&

&&&&&&&&4. ! Write& as& fractions. &

&&&

&&&&&&&5. ! Perform& the& following& operations.&Give& the& answer& as& a& decimal& and& a& fraction.&

!

!

Number& Sense&&

&Revision& for&Math& Studies& SL&

5&

50 × 0.1 = 77777777777777777777777777777435 × 0.01 = 77777777777777777777777777777777120.01

= 7777777777777777777777777777771

0.025=&

&&&&&&&&&&&&&&&6. ! &&&&&&&&&7. ! Calculate.&Give& your& answer& as& a& fraction& and& a& decimal.&&

972−43; ×

15=&

&&&&&&&&&&&&

&&&&&&

Number& Sense&&

&Revision& for&Math& Studies& SL&

6&

8. ! Nina& scored& 70& out& of& 80& in& a& test,& find& her& score& as& a& percentage.&&&&&&&&&&&&&&&&&9. ! Jeff& bought& a& car& for& $4000& and& sold& it& for& $5000.&What& is& his& percentage& profit?&&&&&&&&&&&&&&&&&10. !John& bought& a& car& for& $4000& and& sold& it& for& $3000.&What& is& his& percentage& loss?&

&&&&&&&&&&&&&

Number& Sense&&

&Revision& for&Math& Studies& SL&

7&

11. !A& school& has& 80& staff.�15%& of& the& staff& wear& glasses.&&Calculate& the& number& of& staff& that& wear& glasses.&&

&&&&&&&&&&&&&&12. !Ayesha& plays& hockey.�Last& year& Ayesha& scored& 8& goals.& This& year& Ayesha& scored& 13& goals.&

Calculate& the& percentage& increase& in& for& the& number& of& goals& scored.&&

&&&&&&&&&&&13. !56%& of& students& in& a& school& are& girls.�There& are& 420& girls& in& the& school.&&

Work& out& the& total& number& of& students& in& the& school.& &&&

&&&&&&&&&&&

Number& Sense&&

&Revision& for&Math& Studies& SL&

8&

14. !Find& the& Lowest& Common&Multiple& (LCM).&& (or& Least& Common&Multiple)& of:&&&&& 60& and& 72&&&&&&&&&&

&&

15. !Find& the& Greatest& Common& Factor& (GCF)& (or& Highest& Common& Factor)& of:&&& 21& and& 35&&&&&&&&&&&&16. !Find& the& Greatest& Common& Factor& (GCF)& (or& Highest& Common& Factor)& of:&&& 21& and& 35&&&&&&&&&&&17. !Find& the& Highest& Common& Factor& and& Lowest& Common&Multiple& of& 168& and& 180.&

&&&&&&&&&&&

Number& Sense&&

&Revision& for&Math& Studies& SL&

9&

18. !Solve.& Leave& your& answer& in& Standard& form.&&&&&&&&&&&&&&&&&&

19. !At& a& school& the& ratio& of& the& number& of& boys& to& number& of& girls& is& 9:11& There& are& 96&more!girls&than& boys.&Work& out& the& total& number& of& students& at& the& school.&&&&&&&&&&&&&&

20.!Water needs to be removed from an underground chamber before work can commence. When the water was at a depth of 3m, five suction pipes were used and emptied the chamber in 4 hours. If the water is now at a depth of 5m (same cross- section), and you want to empty the chamber in 10 hours time, how many pipes need to be used?

&&&

&&&&

&&

a)&&b) &&c)&

Number& Sense&&

&Revision& for&Math& Studies& SL&

10&

Sets!and!Venn!Diagrams!&21. !&&&&&&&&&&&&22. !Given& the& Universal& set&&ℰ = {odd7numbers7less7than715}7&where&A& and&B& are& subsets& of&ℰ.&&

A = {prime numbers} B = {multiples of 3}

List:�

&&&&&&&&&&&&&&

23.!L = {2, 3, 5, 7, 11}, M = {3, 4, 5, 6}, O = {1, 2, 4, 5, 10, 20}. List:

&&&&&&&&&&&&&&&&&&&&&&&

(a)!L ∩ O& ………………………………………………………………. ..&

(b) !L ∪ O&& ……………………………………………………………. …. &

(c)! M ∪ O& ………………………………………………………………. ..&

(d)!M ∩ O&& ……………………………………………………………. …. &

(e)! Is&5 ∈ L ∩ M7?& …………………………………………………. ..&Explain& your& answer. &&

(a)!A#……………………………………………………………………………. &

(b) !B#……………………………………………………………………………. &

(c)! A’& ……………………………………………………………………………. &

(d)!B’& ……………………………………………………………………………. &

&

Number& Sense&&

&Revision& for&Math& Studies& SL&

11&

24. !Draw& a& Venn& diagram& for& the& following.&&

Universal& Set:& 777(7 = 7 {TUVWXWYZ7 ≤ 710}77And& & & 77[7 = 7 {\]^V_YZ7_\720}77&

&`7 = 7 {abcVTdcWZ7_\73}77

&&&&&&&&&&&&&&25. !&&

&&&&&&&&&&&&&&&&&&&&&&&&&

&

subsets& of&ℇ&

Number& Sense&&

&Revision& for&Math& Studies& SL&

12&

&26. !&

&&&&&&&&&&&&&&&&&&&&

27. !&&&&

&

&&

28. !&&&&&&&&&&

Number&of&students&who&play&tennis&=&&

Number& Sense&&

&Revision& for&Math& Studies& SL&

13&

&29. !&

&&&&&&&&&&&&&&&&&&&&&&&&&&

30. !&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&

Number& Sense&&

&Revision& for&Math& Studies& SL&

14&

31.!Find the 51st

term of the sequence 30, 23, 16, 9, ...

32.!Find the nth term formula of the sequence 7, 11, 15, 19, ...

33.!Find the first three terms of the sequence if un = 7n – 5 &

&&

&&&&&&&34. !&&&&&&&&&&&

Number& Sense&&

&Revision& for&Math& Studies& SL&

15&

35. !Determine& the& value(s)& of& the& 7th& term& in& the& following& geometric& sequences.& Show& your&working& out.& u5& =1,& u8& =27,&& u7& =&&

&&&&&&&&&&&&&&&&&&&&&&&&36. !&&&&

&&&&&&&&&

37. !&

Foundations& of& Algebra&&

&Revision& for&Math& Studies& SL&

16&

SECTION!2:!Foundations!of!Algebra!1. ! Simplify& 5x& +& 4y& +& x& –& 7y&&

&&&&&&&&2. ! Solve& 3(x& –& 2)& =& x& +& 7&&

&&&&&&&&&&

3. ! Solve&4fgh= 1&&

&&&&&&&&&&&

4. ! Solve& 9x–11=5x+7& &&&&&&&&&&&&

Foundations& of& Algebra&&

&Revision& for&Math& Studies& SL&

17&

5. ! Expand& and& simplify:&&a)&& 11& –& 8(a& –& 8)& & & & & b)&& 3a& +& 4(a& –& 3)& &&&&&&&&&&&c)&& 7a& –& 9(8& –& 3a)& & & & & d)&& 4(b& +& 6)& +& 5(b& +& 3)& &&&&&&&&&&&&e)&& 7(4b& –& 3)& –& 9(2b& –& 5)& & & & f)&& c(b& +& 9)& –& b(4c& +& 3b)&

&&&&&&&&&&&&&&&&&&&&&

!

Foundations& of& Algebra&&

&Revision& for&Math& Studies& SL&

18&

6. ! Expand& and& simplify:&&

a)&&(i + 7)(i + 4)& &&&& & b)&(i + 8)(i − 9)&& & & c)&(i − 6)(i − 12)& &&&&&&&&&&d)&(i − 7)4& & & e)&(3i + 8)(2i + 7)& & & f)&(9i − 7)(5i + 11)&

&&&&&&&&&&&&&&&&g)&(12 − 5i)(6i + 7)& & h)&(4i + 9)(4i − 9)&& &&&&&& & &

&&&&&&&&&&&&&&& &

!

!

!

Foundations& of& Algebra&&

&Revision& for&Math& Studies& SL&

19&

7. ! Solve& the& following& by& using& the& GDC:&&

&&&&&&&&& a)&&2i4 + 15i + 7 = 0& & & & & b)&3i4 + 13i + 12 = 0& &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& c)&5i4 − 8i − 21 = 0& & &&&&&&&&&&&&&&&&&&& & d)&2i4 − 13i + 21 = 0&&&&&&&&&&&&&#########e)& 3i4 + 16i − 64 = 07&& & &&&&&&&&&&&&&&&&&&& f)&4i4 + 16i + 15 = 0&&&&&&&&&&&&&&&&&&&

Foundations& of& Algebra&&

&Revision& for&Math& Studies& SL&

20&

Functions!&8. ! Simultaneous& Equations:& You&must& show& your&working& clearly. &&

a)! &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& b)&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& c)&&&&&&&&&&&&&&&&&&

Foundations& of& Algebra&&

&Revision& for&Math& Studies& SL&

21&

Graphing!&&9. !M& is& the& point& (−2,& 4)& and&N& is& the& point& (6,& −8).&&&&! a& & Find& the& coordinates& of& the&midpoint& of& the& line&MN. &&&&&&&&! b& & Find& the& gradient& of& the& line&MN.&! !!! !!!!!!!! c& & Find& the& equation& of& this& line. &!!!!!!!!!! d& & Another& line&PQ& is& parallel& to&MN& and& passes& through& the& point& (1,& 5).&&&&& & Find& the& equation& of&PQ.&&&&&&&&&&&&&

Foundations& of& Algebra&&

&Revision& for&Math& Studies& SL&

22&

&! d& & Another& line&RS& is& perpendicular& to&MN& and& passes& through& the& point& (1,& 5).&&&&& & Find& the& equation& of&RS.&&&&&&&&&&&&&&&&&&&&&

10. !The& point& A& (−3,& 5)& and& the& point& B& (1,& −15)& lie& on& the& line& L.&&a. ! Find& the& equation& of& the& line& L.&&b. ! Find& the& distance& between&A#and& B.&

&

&

&

&

&

&

&

&

&

&

&

Foundations& of& Algebra&&

&Revision& for&Math& Studies& SL&

23&

11. !A& line& has& equation& 6x+2y+9=0& &

(a)& Find& the& gradient& of& the& line.&&

(b)& Find&where& the& line& crosses& the& y]axis& &

&

&

&

&

&

&

&

&

12. !What& is& the& slope,& x]intercept,& and& y]intercept& of& the& equation&5i − 4k = 8& ?&

&

&

&

&

&

&

&

&

&

&

&

&&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

24&

SECTION!3:!The!Art!of!Geometry!and!Trigonometry!&1. ! Find& the&missing& angles. &

a& =&

b& =&

c& =&

d& =&

e& =&

f& =&

g& =&

&&&&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

25&

2. ! &&&&&&&&&&&&&&&&&&&&&&3. ! Find& the& perimeter& and& area& of& the& following& shape.&

&&&&&&&&

&&&&&&&&&&&&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

26&

&4. ! Find& the& volume& and& surface& area& of& the& following&shape. &

&&&&&&&&&&&&&&&&&&&&&&&

5. ! Calculate& the& height& of& a& closed& cylinder&with& a& volume& of& 250& cm3& and& a& radius& of& 5. 5& cm.& Find&the& surface& area& of& the& cylinder. &&&&&&&&&&&&&&&&&&&&&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

27&

&6. ! &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&7. ! &&&&&&&&&&&&&&&&&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

28&

8. ! &&&&&&&&&&&&&&&&&&&&&&&&&&&&

9. ! &&&&&&&&&&&&&&&&&&&&&&&&&&&&

&

&(a)!…………………………………&

&(b) !………………………………...&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

29&

&10. !&&&&

&&&&&&&&&&&&&&&&&&&&&&&&&

11. !&&&&&&&&&&&&&&&&&&&&&&

&&&

&

&

&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

30&

&SECTION!4:!The!Truth!about!Statistics!and!Probability!

!1. ! &&&&

&&&&&&&&&&&&&&&&&&&&

&&&

&&& &

a)&

b) &

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

31&

2. ! &&&&&&&

&&&&&&&&&&&&&&&&&&&&

(b)& i)&Median:& …………………. &

&&&&&& ii)& IQR& …………………………&

&(c)& ………………………………………………………. . …&

………………………………………………………………. &

………………………………………………………………. . &

………………………………………………………………. &

………………………………………………………………. . &

(d)&Median:& …………………………&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

32&

3.! Bob asked each of 40 friends how many minutes they took to get to work. The table shows some information about his results.

&&&&&&&&&

(a)!Work out an estimate for the mean time taken.

(b)!State the modal class interval.

(c)!Find the group containing the median.

& &

&

&

&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

33&

4. ! &&&&&&

&&&&&&&&

&&

5. ! &&&&&&&&&&&

& &

&

&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

34&

6. ! &&&&&&&&&&&&&&&&&&&&&&&&&&&&&

7.! 20 students scored goals for the school hockey team last month. The table gives information about the number of goals they scored.

(a) Write down the modal number of goals scored.

(b) Work out the range of the number of goals scored.

(c) Work out the mean number of goals scored.

&& &

&(a)!Median:& ………………………. &&&(b)& IQR:& ………………………………&

&(a)!Modal& Number:& ……………. . &&(a)!Range:& …………………. ………. &&(b)&Mean:& ……………………………&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

35&

8. ! The& table& gives& information& about& the& heights,& h&metres,& of& trees& in& a& wood.&&

&

Draw& a& histogram& to& show& this& information.&&

&

& &

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

36&

9. ! The& scatter& graph& shows& information& about& 10& apartments& in& a& city. &The& graph& shows& the& distance& from& the& city& centre& and& the&monthly& rent& of& each& apartment.&&

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The& table& shows& the& distance& from& the& city& centre&and& the&monthly& rent& for& two& other&apartments.&&

&&

(a)!On& the& scatter& graph,& plot& the& information& from& the& table. &

(b) !Describe& the& relationship& between& the& distance& from& the& city& centre& and& the&monthly& rent.&&&

&

.....................................................................................................................................................&

.....................................................................................................................................................&&

&An& apartment& is& 2. 8& km& from& the& city& centre. &

(c)& Find& an& estimate& for& the&monthly& rent& for& this& apartment.&&

&& &

&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

37&

11.!This frequency table gives information about the ages of 60 teachers.

&

(a)!Complete the cumulative frequency table.

&

(b)!On the grid opposite, draw a cumulative frequency graph for this information.

(c)!Use your cumulative frequency graph to find an estimate for the median age.

........................... years

(d)!Use your cumulative frequency graph to find an estimate for the number of teachers older than 55 years.

&&

&&&&&&&&&&&&&&&

&

&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

38&

&&& &

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

39&

12. !Emily& has& a& bag& of& 20& fruit& flavour& sweets.&&

7& of& the& sweets& are& strawberry& flavour,& &11& are& lime& flavour,&2& are& lemon& flavour.&&

Emily& takes& at& random& a& sweet& from& the& bag.&Write& down& the& probability& that& Emily& &

(a)&& takes& a& strawberry& flavour& sweet,& &

(b)&& does& not& take& a& lime& flavour& sweet,& &

(c)&& takes& an& orange& flavour& sweet.&&

& & &(a)!…………………………………….. &&(b) !………. .. …………………. ………. &&(c)& ………………………………………&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

40&

13.!Hannah is going to play one badminton match and one tennis match. The probability that she will win the badminton match is l

mn.

The probability that she will win the tennis match is 4h .

(a) Complete the probability tree diagram.&

&&

(b) Work out the probability that Hannah will win both matches.

&&&&&&&

(c) Work out the probability that Hannah will win only one match.

& &

&

&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

41&

14. !&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&

&(a)!……………………………………………. . &&&(b)& ……………………………………………. . &&&(c)& ………………………………………………&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

42&

15. !&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&

16. !&&&&&&&&&&&&&&&

&(b) !……………………………………………. . &&&(b)& ……………………………………………. . &&&(c)& ………………………………………………&

&(a)!……………………………………………. . &&&(b)& ……………………………………………. . &&&&

ADDITIONAL& CONTENT& FOR& HIGHER& LEVEL&MATHEMATICS&&

&Ticket& to& IB&Mathematics& HL&

43&

17. !Adam& and& Boris& regularly& play& each& other& at& chess&and& in& 60%& of& their& games& each& player& is&subject& to& a& time& limit.& Adam&wins& 45%& of& the& games& played&with& a& time& limit& but& only& 30%& of&the& games& played&without& a& time& limit.&&&

(a)! Find& the& probability& that& Adam&wins& his& next& game&of& chess& against& Boris.&&

& (b)&Given& that& Adam&wins& a& game,& find& the& probability& that& it& was& played&with& a& time& limit. &&&& &

(a)!……………………………………………. . &&&(b)& ……………………………………………. . &&&&

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