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Elementary math College

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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 - ,

    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 - ,

    pig

  • Elementary math College - ,

    2/7

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