Probability Review

Two number cubes are rolled. Find the probability that the sum is 10.

• 0/12

• 1/12

• 0/6

• 1/6

Two number cubes are rolled. Find the probability that the sum is 8.

• 5/36

• 4/12

• 0/6

• 1/6

Christina has 3 coins. If she flips all the coins at once, how many outcomes are in the sample space?

• 2

• 4

• 6

• 8

George spins 2 spinners. Each has 4 equal size sections of various color. How many outcomes are in the sample space?

• 2

• 4

• 16

• 8

A six sided number cube is rolled 400 times and the result are recorded as follows: 63 ones, 82 twos, 71 threes, 50 fours, 78 fives, and 56 sixes. What is the experimental probability of not rolling a five? Give a percent

• 81%

• 80%

• 8%

• 8.1%

On the last history test, 20 out of 28 students scored an 85 or above. What is the experimental probability that a student selected at random will score an 85 or above? (PERCENT)

• 71%

• 20%

• 85%

• 28%

If you roll a number cube 85 times, how many times do you expect to roll a 2?

• 1

• 14

• 2

• 85

David predicts that 98% of the people he invites to he party will come. If he wants to have at least 20 guests, how many people should he invite to his party?

• 21

• 20

• 40

• 42

A coin is tossed and a single die is rolled. What is the probability that the coin shows tails and the die shows an even number?

• 3/6

• 1/2

• 1/4

• 1/6

On the last math test, 13 out of 25 students scored a 70 or higher. What percent is the experimental probability that a student selected at random will score a 70 or higher on the next test?

• 70%

• 13%

• 52%

• 30%