Solving Dependent Probability Problems

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

What is the probability of drawing number divisible by 3, then drawing a 1? (no replacement--dependent event)

• 4/8 = 1/2

• 2/7

• 4/9

• 8/56 = 1/7

Two marbles are drawn without replacement. What's the probability of drawing a white marble and then a black marble?

• 8/100

• 6/19

• 4/45

• 2/25

What is the probability when Sue will randomly select from a treat bag containing 6 lollipops and 4 gum balls. Sue will select a treat, not replace it, and then select a second treat. Find P(gumball then lollipop)

• 1/24

• 4/15

• 1/100

• 2/10

A box contains 3 brand A batteries and 7 brand B batteries. 30% of brand A batteries are faulty and 40% of brand B batteries are faulty. A battery is selected at random and then checked to see if it is faulty. What is the probability that a not faulty brand A battery is selected?

• 0.21

• 0.09

• 0.28

• 0.25

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

• 1/18

• 2/5

• 3/7

• 4/9

Each letter of the word Banana is written on a card. Find each probability if you pick two cards without replacing the first.

• 2/30

• 6/30

• 3/30

• 0

Each letter of the word Banana is written on a card. Find each probability if you pick two cards without replacing the first.

• 2/30

• 6/30

• 3/30

• 0

Two cards are drawn at random without replacement. Find P(blue, red) and write as a fraction in simplest form.

• 1/3

• 1

• 2/6

• 2/9