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    4. Permutation and combination
    5. A group consists of 9 boys and 7 girls. In how many ways can 4 boys and 3 girls be selected from the

    Question

    A group consists of 9 boys and 7 girls. In how many ways

    can 4 boys and 3 girls be selected from the group?
    A 4410 Correct Answer Incorrect Answer
    B 4610 Correct Answer Incorrect Answer
    C 4710 Correct Answer Incorrect Answer
    D 4810 Correct Answer Incorrect Answer

    Solution

    Required number of ways = 9C4 × 7 C3
    = (9! / (4! × 5!)) × (7! / (3! × 4!))
    = 126 × 35 = 4,410

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    Relevant for Exams:

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