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Question: The is a meeting organized, every person shake hands with the other only once. if there are 60 shake hands, how many persons are there in the meeting?.
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| July 07, 2008 06:27:05 |
#9 |
| pragyan.anand |
Member Since: July 2008 Total Comments: 2 |
RE: The is a meeting organized, every person shake hands with the other only once. if there are 60 shake hands, how many persons are there in the meeting?.
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selecting 2 people at a time from n people can be done in nc2 ways i.e.,n(n-1)/2 ways
=> n(n-1)/2=60
=> n is a rational value.......
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