What is the probability of getting an even number when you roll a die once?.

What is the probability of getting an even number when you roll a die once?.

3 out of 6 , 3/6 or 50%

If you are looking at a pile of jelly beans and you choose one, are you are choosing at

random?

If you are looking at a pile of jelly beans and you choose one, are you are choosing at random?

False

When you toss a coin two times, the sample space contains six possible outcomes.

When you toss a coin two times, the sample space contains six possible outcomes.

False (2 x 2 = 4 possible outcomes)

The probability that an event happens is 4/12. What is the probability that the event

will not happen?

The probability that an event happens is 4/12. What is the probability that the event will not happen?

8/12 = 2/3

What is the probability of drawing a red face card (i.e., king, queen, or jack) from a full

deck of playing cards?

What is the probability of drawing a red face card (i.e., king, queen, or jack) from a full

deck of playing cards?

6/52 = 3/26

If you spin this spinner 30 times, how many times might you expect it to land on red?

If you spin this spinner 30 times, how many times might you expect it to land on red?

30 x 1/3 = 30/3 = 10 times

There are 14 marbles in a bag: 4 red, 4 orange, 5 green, and 1 blue. You take one

marble out of the bag. What is the probability of getting a red or a blue marble?

There are 14 marbles in a bag: 4 red, 4 orange, 5 green, and 1 blue. You take one

marble out of the bag. What is the probability of getting a red or a blue marble?

5/14

A spinner is divided into 6 equal parts: 3 green, 2 blue, and 1 red. What is the

probability of spinning green?

A spinner is divided into 6 equal parts: 3 green, 2 blue, and 1 red. What is the

probability of spinning green?

3/6 = ½

Each letter of the word PROBABILITY is written on a separate card and placed in a

bag. Fareshta draws one card from the bag. What is the probability of her drawing a B?

Each letter of the word PROBABILITY is written on a separate card and placed in a

bag. Fareshta draws one card from the bag. What is the probability of her drawing a B?

2/11

How many possible outcomes are there when you flip a coin and roll a six-sided die at the

same time?

How many possible outcomes are there when you flip a coin and roll a six-sided die at the same time?

(2 x 6) = 12

If you hit the ball 25% of the time you get to bat, how many hits would you expect to get in

40 at-bats?

If you hit the ball 25% of the time you get to bat, how many hits would you expect to get in 40 at-

bats?

¼ of 40 = 1025% of 40 = 10.25 x 40 = 10

Grant successfully makes one half-court shot out of three. What is the probability that he

scores two half-court shots in a row?

Grant successfully makes one half-court shot out of three. What is the probability that he

scores two half-court shots in a row?

1/9 (independent events)

An ice-cream store sells 5 different flavours of ice cream that can be topped with 5 different

toppings. How many flavour and topping combinations are there?

An ice-cream store sells 5 different flavours of ice cream that can be topped with 5 different

toppings. How many flavour and topping combinations are there?

25 (5 x 5 = 25)

Scott’s sock drawer has 6 green socks, 8 white socks, and 4 black socks. What is the

probability that he will pull out a white sock?

Scott’s sock drawer has 6 green socks, 8 white socks, and 4 black socks. What is the

probability that he will pull out a white sock?

4/9

A grade 7 class has 18 boys and 14 girls. If a student is picked at random, what is the

probability of picking a boy?

A grade 7 class has 18 boys and 14 girls. If a student is picked at random, what is the

probability of picking a boy?

9/16

What is the probability of picking a sour-apple candy from a jar of candies that has 17 sour

apples, 9 sweet berries, and 4 wacky watermelons?

What is the probability of picking a sour-apple candy from a jar of candies that has 17 sour

apples, 9 sweet berries, and 4 wacky watermelons?

17/30

In a board game, you can move any number of spaces up to and including the value you

spin. The spinner is divided into 4 equal sections, numbered 1 to 4. What is the

probability that you win on your next roll, if you are 3 spaces short of the finish line?

In a board game, you can move any number of spaces up to and including the value you spin. The spinner is divided into 4 equal sections,

numbered 1 to 4. What is the probability that you win on your next roll, if you are 3 spaces

short of the finish line?

You need #3 or #4 therefore 2/4 or 1/2

To simulate the gender of an unborn baby, you could use

To simulate the gender of an unborn baby, you could use

a coin (2 outcomes)

Four students are running for student council president. Of 30 students polled, 15 choose

Mike, 4 choose Jean, 5 choose Winston, and 6 choose Francesca. What is the probability of

Jean or Francesca winning the election?

Four students are running for student council president. Of 30 students polled, 15 choose

Mike, 4 choose Jean, 5 choose Winston, and 6 choose Francesca. What is the probability of

Jean or Francesca winning the election?

10 out of 30 = 10/30 = 1/3 = 33%

Jeff saves 75% of the shots on goal. If Jeff faces 20 shots in his next game, how many

goals can he expect to let in?

Jeff saves 75% of the shots on goal. If Jeff faces 20 shots in his next game, how many

goals can he expect to let in?

75% of 20 =5 0.75 of 20 = 5¾ of 20 = 5