A box contains 5 plain pencils and 7 pens. A second box contains 4 color pencils and 4 crayons. One

Discussion in 'Calculator Requests' started by math_celebrity, Feb 11, 2018.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    A box contains 5 plain pencils and 7 pens. A second box contains 4 color pencils and 4 crayons. One item from each box is chosen at random. What is the probability that a plain pencil from the first box and a color pencil from the second box are selected?

    Probability of plain pencil from first box:
    5/(5 + 7) = 5/12

    Probability of color pencil from second box:
    4/(4 + 4) = 4/8 = 1/2

    Probability of both events together:
    Since each event is independent, we multiply probabilities:
    5/12 * 1/2 = 5/24
     

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