Homework Help: Elementary math College

Posted by Anna on Tuesday, March 30, 2010 at 1:33pm.

A bag contains 7 red chips and 9 blue chips. Two chips are selected randomly without replacement from the bag. What is the probability that the two chips are the same color?

Elementary math College - PsyDAG, Wednesday, March 31, 2010 at 2:05pm
To get the first red chip = 7/16, for the second 6/15. The probability of both occurring is found by multiplying the individual probabilities.

To get the first blue chip = 9/16, for the second 8/15. The probability of both occurring is found by multiplying the individual probabilities.

The probability of getting either 2 blue or two red is found by adding the probabilities of your two previous answers.
Elementary math College - Anonymous, Monday, December 6, 2010 at 7:05am
pig
Elementary math College - Anonymous, Tuesday, January 10, 2012 at 6:46pm
2/7

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