Beginning Probability

Spinner A and Spinner B below are each to be spun once. If the pointer CANNOT land on a line, how many different outcomes of a number and a color are possible?

• 18

• 15

• 20

• 25

A box contains 3 pens, 2 markers, and 1 highlighter. Olivia selects one item at random and does not return it to the box. She then selects a second item at random. What is the probability that Olivia selects 1 highlighter and then 1 marker?

• 2/42

• 5/36

• 2/30

• 6/36

Which spinner has a 2 out of 3 probability of landing on white?

• Joy’s

• Colin’s

• Desmond’s

• Yvonne’s

A die is rolled. What is the probability that the result is less than 3 ?

• 1/2

• 1/3

• 1/4

• 1/6

You have a jar of 20 jellybeans, and 4 are red. Which fraction represents the probability that you will pick a red jellybean out of the jar?

• 4/20

• 16/20

• 20/4

• 20/16

You have a jar of 20 jellybeans with 4 red beans, and you take out 1 red jellybean. Now, after taking out this bean, what is the new probability that you will pick a red jellybean out of the jar?

• 3/19

• 4/20

• 4/19

• 3/20

You have a 1 in 4 chance of winning a game. How would you calculate the probability that you will win 3 times in a row?

• 3 x 1/4

• 1/4 x 1/4 x 1/4

• 1/4 + 1/4 + 1/4

• 1/4

You have the same bowl, with 5 orange, 6 blue, 3 green, 4 red and 7 yellow candies. You take out an orange candy from the bowl. What is the new probability that you will draw another orange candy?

• 1/5

• 5/24

• 1/8

• 1/6

If a stone is dropped at random on the arrangement of tiles shown, what is the probability the stone lands on a black tile?

• 5/9

• 4/9

• 1/2

• 1/9

This game board is made up of concentric circles. The center circle has a diameter of 4 inches. Each successive ring has a radius 2 inches greater than the ring before. Find the probability of scoring 80 points.

• 2/3

• 1/3

• 3/4

• 1/4