Question

    A group consists of 12 boys and 7 girls. In how many

    ways can 5 boys and 3 girls be selected from the group?
    A 27720 Correct Answer Incorrect Answer
    B 27920 Correct Answer Incorrect Answer
    C 28020 Correct Answer Incorrect Answer
    D 28120 Correct Answer Incorrect Answer

    Solution

    Required number of ways = 12 C 5 × 7 C 3
    = (12! / (5! × 7!)) × (7! / (3! × 4!))
    = 792 × 35 = 27,720

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