JEE Main & Advanced Mathematics Permutations and Combinations Question Bank Definition of permutation, Number of permutations with or without repetition, Conditional permutations

  • question_answer
    If the letters of the word SACHIN arranged in all possible ways and these words are written out as in dictionary, then the word SACHIN appears at serial number [AIEEE 2005]

    A) 603

    B) 602

    C) 601

    D) 600

    Correct Answer: C

    Solution :

    Words starting with \[A,C,H,I,N\] are each equals to 5! \ Total words = 5×5! =600 The first word starting with S is SACHIN. \ SACHIN appears in dictionary at serial number 601.

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