# math

There are 5 blue chips, 4 red chips and 3 yellow chips in a bag. One chip is drawn from the bag. That chip is placed back into the bag, and a second chip is drawn. What is the probability that the two selected chips are of different colors? Express your answer as a common fraction.

1. 👍 3
2. 👎 0
3. 👁 1,111
1. 3 cases:
BB ---> (5/12)(5/12) = 25/144
RR ---> (4/12)(4/12) = 16/144
YY ---> (3/12)(3/12) = 9/144

1. 👍 0
2. 👎 2
👨‍🏫
Reiny
2. are you sure about the 144?

1. 👍 0
2. 👎 0
So we need
1 - (25/144 + 16/144 + 9/144)

1. 👍 2
2. 👎 0
👨‍🏫
Reiny

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