Multiple Choice Questions on After a get together every person present shakes the hand of every other person If there were 105 ha........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

After a get together every person present shakes the hand of every other person If there were 105 ha...........

Quantitative Aptitude ( CCS) Permutation & Combination
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    After a get together, every person present, shakes the hand of every other person. If there were 105 hands shakes in all, how many persons were present in the party?

    13

    Incorrect Answer

    14

    Incorrect Answer

    15

    Correct Answer

    16

    Incorrect Answer
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    Explanation:

    Let total number of persons present in the party be x,

    Then x(x-1) /2 = 105

    x = 15

    Hence, option 3 is the correct answer.

    By: Amit Kumar
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