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March 29, 2017

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a bag contains 7 red chips and 9 blue chips. Two chips are selected randomly from the bag without replacement. What is the probability that the two chips are the same color?
If someone could just point me in the right direction for the many equations I could use I would be grateful. I'm stumped!

  • college math - ,

    The probability of getting two red chips = 7/16 times 6/15.

    The probability of getting two blue chips = 9/16 * 8/15.

    The probability of getting either one or the other is found by adding those two products.

    I'll let you do the calculations.

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