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January 30, 2015

January 30, 2015

Posted by **HM** on Wednesday, November 9, 2011 at 4:20am.

What is the probability that the two chips are the same color? Round your answer to 3 decimal places..

Help me find the answer.

Is there another way to answer it without the tree method?

- PROBABILITY MATH -
**Reiny**, Wednesday, November 9, 2011 at 8:06amYou could pick either 2 reds or 2 blues

prob(2 reds) = (10/22)(9/21) = 15/77

prob(2 blues) = (12/22)(11/21) = 2/7

prob(your event) = 15/77 + 2/7 = 37/77

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