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    Question

    In a group of 9 boys and 6 girls, 5 students have to be

    selected. In how many ways it can be done so that only 2 boys are included.
    A 720 Correct Answer Incorrect Answer
    B 760 Correct Answer Incorrect Answer
    C 700 Correct Answer Incorrect Answer
    D 740 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    => 9C2 × 6C3 = [9!/(9 -2)! 2!] × [6!/(6 -3)! 3!] => [9!/7! 2!] × [6!/3! 3!] => 720 ways

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