Find out number of members
Probability
Level
pending
When a meeting of a committee was over, every member shook hands with another and the total number of hands shake was 6. how many members were there in the meeting?
4 or -3
-3
12
4
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1 solution
Let present person number is n and Requires tow person for doing a hand shake. So,
where n=present person number, r=2 Answer is: n=4 [causes neglect the negative number]