Probability Test Review

Based on the results in the table, what is the experimental probability of rolling a number less than 4?

• 16%

• 66%

• 50%

• 34%

When rolling a standard number cube, what is the theoretical probability of rolling a number less than 3?

• 1/3

• 1/6

• 1/2

• 2/3

Chris tosses three quarters up in the air. What is the probability that all three will land on tails?

• 1/2

• 1/6

• 1/8

• 3/8

Without looking Christy pulls socks from a drawer containing 2 white socks, 6 black socks, and 4 yellow socks. Find the probability of drawing a black then a yellow WITHOUT REPLACEMENT.

• 1/6

• 2/11

• 1/2

• 1/3

How many possible outcomes are there if a number cube is rolled twice.

• 12

• 18

• 24

• 36

You pick a marble from this bag.
What is the probability you will choose either a black or white marble?

• 3/5
• 9/100
• 1/10
• 2/5

Which event is not a dependent event?

• Picking 2 students to each be line leader and door holder from a group of 20 students
• Picking 2 marbles from a bag without replacing the first marble
• Picking 2 crayons from a box at the same time (simultaneously) 
• Picking an earring, replacing it, then picking a 2nd earring

What is the probability of spinning green?

• 0
• 1/4
• 1/2
• 3/4

A jar contains 4 white chips, 5 purple chips, and 1 black chip. Chips are selected randomly one at a time, and are not replaced.
P(white, then purple, then black)

• 1/36
• 2/39
• 5/41
• 6/43

Clara picks a marble at random, puts it back, and then picks another marble at random.

• Dependent
• Independent