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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! Γ— 7! Γ—2! Correct Answer Incorrect Answer
      B 5! Γ— 6! Γ— 2! Correct Answer Incorrect Answer
      C 6! Γ— 7! Γ— 2! Correct Answer Incorrect Answer
      D 5! Γ— 7! Γ— 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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