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RAHUL KUMAR

· started a discussion

· 1 Months ago

ll (Question: 260004.0 )

it is simple combination question.

nC r;

Question:

If ten friends shake hands mutually, then the total number of hand shakes is –

Options:
A)

45

B)

50

C)

90

D)

100 

Solution:

Ans: (a)

If 10 people meet and shakes hand with each other. First person will shake hand with other 9, second person had already shaked hand with 1st person and shakes hand with other 8, third………..

So, the total no. of hand shakes= 9+8+7+6+5+4+3+2+1=45 shakes

Knowledge Expert

· commented

· 1 Months ago

Dear Student ,
The given answer is correct.
You can see the detailed solution.

Thanks and Regards
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