JEE Main & Advanced Mathematics Permutations and Combinations Question Bank Definition of combinations, Conditional combinations, Division into groups, Derangements

  • question_answer
    In a conference of 8 persons, if each person shake hand with the other one only, then the total number of shake hands shall be [MP PET 1984]

    A) 64

    B) 56

    C) 49

    D) 28

    Correct Answer: D

    Solution :

    Total number of shake hands when each person shake hands with the other once only = \[^{8}{{C}_{2}}=28\] ways.


You need to login to perform this action.
You will be redirected in 3 sec spinner