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    Question

    History books are always together and also Geography

    books are always together? Directions (Q.61 -65): In how many ways 5 History books and 7 geography books can be arranged in a row so that :
    A 5! × 7! ×2! Correct Answer Incorrect Answer
    B 5! × 6! × 2! Correct Answer Incorrect Answer
    C 6! × 7! × 2! Correct Answer Incorrect Answer
    D 5! × 7! × 3! Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Reqd. no. of ways = 5! 7! 2!

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