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  3. 11th Class
  4. Mental Ability
  5. Permutations and Combinations

11th Class Mental Ability Permutations and Combinations Question Bank Question - Permutation and Combination

  • question_answer
    How many different words can be formed with the letters of the word NAINITAL such that each of the word begin with L and end with T?

    A) 90

    B) 80

    C) 88

    D) 82

    E) None of these

    Correct Answer: A

    Solution :

    Explanation Option (a) is correct. When L and T are fixed as first and last letters of the word, then we have only 6 letters to be arranged. Hence required number of permutations \[=\frac{6!}{2!\times 2!\times 2!}=90\]


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