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March 29, 2017

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30 basketballs (15 Spalding, 10 Wilson, and 5 other brand-name balls) are on a basketball court. Barry Wood closes his eyes and arbitrarily picks up a ball from the court. Determine the probability that the ball selected is

a Wilson or a Spalding.

  • Math - ,

    prob = 25/30 = 5/6

  • Math - ,

    Let U = {5, 10, 15, 20, 25, 30, 35, 40}

    A = {5, 10, 15, 20}

    B = {25, 30, 35, 40}

    C = {10, 20, 30, 40}.

    Find A ⋂ B.

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