Dependent Probability Practice

Determine which compound event is DEPENDENT.

• Selecting a candy bar from a bag, eating the candy bar, and selecting again

• Selecting a candy bar from a bag, deciding you don't want it, replacing the candy bar and selecting again.

Emily will randomly select one card from the deck, not replace it, and then randomly select a 2nd card. What is the probability that she will select a blue and then a red? Write your answer as a percent.

• 3%

• 18%

• 2.88%

• 4.7%

The arrow of the spinner is spun twice. What is the probability the arrow will land on a blue section and then on a yellow section?

• 4/144

• 3/100

• 3/144

• 4/24

When using a 6-sided number cube, what is the probability or rolling a 3, then not rolling a 3, and then rolling an even number? Simplify.

• 1/12

• 1/2

• 5/6

• 5/72

What is the probability of picking a green marble, keeping it, then picking green again? (leave answer in fraction form in lowest terms)

• 1/7

• 1

• 1/49

• 0

What is the probability of picking a red marble and keeping it, picking another red marble and keeping it, then picking a blue marble? (leave answer in fraction form in lowest terms)

• 2/105

• 4/34

• 2/63

• 4/210

A cookie jar has 3 DOZEN chocolate chip, 1 DOZEN peanut butter, and 2 DOZEN oatmeal cookies. If Megan chooses a cookie, does not replace it, then chooses another, what is the probability that she chooses a peanut butter then a chocolate chip cookie? (leave answer in fraction form in lowest terms) (also, sorry for making you hungry!)

• 2/3

• 1/10

• 11/72

• 6/71

What is the probability of drawing an odd number, then drawing a 6? (no replacement--dependent event)

• 3/8

• 3/7

• 9/56

• 5/37

What is the probability of drawing a 2, then drawing another 2? (no replacement--dependent event)

• 2/8 = 1/4

• 2/56 = 1/28

• 1/7

• 3/7

A fruit basket contains 9 apples, 3 bananas, 7 oranges, 5 pears, and 1 grapefruit. Humperdink randomly chooses a fruit, does not replace it, then chooses another. What is the probably that he chose two pears? (leave answer in fraction form in lowest terms)

• 1/30

• 4/125

• 1/10

• 9/49