If 10 persons meet at a reunion and each person shakes hands exactly once with each of the others, what is the total number of handshakes?
10•9•8•7•6•5•4•3•2•1
10•10
10•9
45
36
ANS is D . How to solve???
PS
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Sorry for the basic question ... but what do you mean by the "C" ... "10 C 2" ... what is the C ?ri2007 wrote:Think as this as how many pairs can u make with 10
so ans is 10 C 2 = 45
thanks.
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II, the word - C - used by ri2007 stands for Combination. This is a math function or concept u can say! For more information, refer the following link -
Correct me If I am wrong
Regards,
Amitava
Regards,
Amitava