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Independent Events

1. Find the probability.

Example

There are three marbles numbered 1 and four marbles numbered 2 in the box.
Take out 1 marble and put it back in the box. Then, take out another marble. Find
the probability of taking out two marbles numbered 2 one after the other.

2 21 1

12 2

a. There are two A cards and three B cards. Thomas picks one card and puts it

back in the box. Then, Ann picks one card. Find the probability that both

Thomas and Ann will pick card A thBe fiBrst Btime.

A A B
B B

AA

b. There are 3 strawberry candies, 2 grape candies, and 1 orange candy in a bag.

Take out 1 candy and put it back in the box, Then, take another one out. Find

the probability of taking out a strawberry candy the first time and an orange

candy the second time. BBB

AA