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Jason, Erik, and Jamie are friends in art class. The teacher randomly chooses 2 of the 21 students in the class to work together on a project. What is the probability that two of these three friends will be chosen?

A. 1/105 B. 1/70 C. 4/50 D. 34/140

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Anonymous

  1. Number of possible pairs chosen
    = C(21,2) = 210

    number of ways to choose 2 of the 3 friends = C(3,2) = 3

    prob(of stated event) = 3/210 = 1/70

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    Reiny

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    sabe

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