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    Question

    In how many ways can 4 boys and 3 girls can be seated in a row so that they are in alternate position.

    A 120 Correct Answer Incorrect Answer
    B 2880 Correct Answer Incorrect Answer
    C 144 Correct Answer Incorrect Answer
    D 24 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    First boys are seated in 4 position in 4! Ways. Now remaining 3 places can be filled by 3 girls in 3! Ways. So, number of ways = 4! × 3! = 144

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