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    Question

    In how many ways can 7 boys and 2 girls can be seated in a row so that they are in alternate position.

    A 5040 Correct Answer Incorrect Answer
    B 720 Correct Answer Incorrect Answer
    C 1440 Correct Answer Incorrect Answer
    D 10080 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    First boys are seated in 7 position in 7! Ways. Now remaining 2 places can be filled by 2 girls in 2! Ways. So, number of ways = 7! × 2! = 10080

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