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Discussion :: Probability

  1. In a group of students, there are 15 boys and 10 girls. If three students are selected at random, what is the probability that 1 girl and 2 boys are selected?

    2. A.
    21/46
    B.
    21/36
    C.
    21/26
    D.
    21/56

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    Answer : Option A

    Explanation :

    Let sample space = S.
    n (S) = number of ways to select 3 students ( 1 girl and 2 boys) out of 25 students
    = 25C3
    Apti Probability

    = 2300
    n (E) = 10C1 * 15C2
    =10 *

    = 1050

    Apply formula:

    Apti Probability

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