Probability Review

A math game is played with 2 fair number cubes. A green cube is numbered 1 through 3, and each number is marked on 2 faces. A red cube has faces numbered 1 through 6. If both cubes are tossed, what is the probability of rolling a 3 on the green cube and a 6 on the red cube?

• 1/3

• 1/18

• 3/12

• 1/6

Denise rolls a number cube that has sides labeled 1 to 6 and then flips a coin. What is the probability that she rolls an odd number and flips heads?

• 1/8

• 1/4

• 1/2

• 3/4

There are 4 jacks in a standard deck of 52 playing cards. If Patricia selects a card at random, what is the probability that it will be a jack?

• 1/52

• 1/2

• 1/13

• 12/13

A baseball player reaches base 7 out of 20 times. How many times can he expect to reach base in 800 at-bats?

• 40

• 787

• 280

• 300

A bag contains 6 red and 10 black marbles. If you pick a marble, record its color, and return it to the bag 200 times, how many times can you expect to pick a black marble?

• 5

• 132

• 76

• 125

For classroom awards, Ms. Blake has coupons in a bag that students can draw at random. In the bag, she has 6 coupons that say “Do Half the Assignment” and 4 coupons that say “No Homework.” What is the probability of Sally drawing a “No Homework” coupon, keeping it, and then Charlie drawing a “No Homework” coupon?

• 4/25

• 2/15

• 6/25

• 1/3

Abigail has a box that contains cards of the same size and shape. There are 6 yellow cards, 3 red cards and 1 green card. She draws a card at random, replaces it, and draws a second card. What is the probability that both cards will be yellow?

• 1/3

• 1/15

• 9/25

• 2/5

Two spinners are shown.

If both spinners are spun at the same time, what is the probability of spinning a B on both spinners?

• 1/12

• 1/6

• 11/12

• 7/12

A spinner and a fair number cube are used in a game. The spinner has an equal chance of landing on 1 of 4 colors: red, purple, blue, or green. The faces of the cube are labeled 1 through 6. What is the probability of a player spinning the color red and then rolling a 5 or 6?

• 3/10

• 1/8

• 1/12

• 1/24

The possible outcomes for flipping three coins is {HHH, HHT, HTH, HTT, THH, THT, TTH, TTT}. What is the probability of flipping at least 2 heads?

• 1/2

• 3/8

• 7/8

• 1/8