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Math

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a class has 10 boys and 5 girls; three students are selected from the class at random one after other. the probability that the first two boys and the third is a girl??

  • Math - ,

    Pr=(10/15)(9/14)(5/13)

  • Math - ,

    10/15 * 9/14 * 5/13 = 15/91 = 0.165 (3sf)

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