Question

At the end of conference 10 persons shkes ther hands how many tottal hand shakes

Answer 1

Answer:

Step-by-step explanation

At the end of a business conference, the ten people present all shake hands with each other once. How many handshakes will there be altogether?

See it this way.. 10 persons A to J.

A can shake hands with B,C,D,E,F,G,H,I,J that is 9 persons.

Similarly B can shake hands with 8 people (As A has already shook hands with B, there is no need for B to shake hands with A again ).

C with 7…. D with 6…. E with 5…. F with 4…. G with 3…. H with 2 and I with 1(i.e. J).

Total handshakes = 9+8+7+6+5+4+3+2+1 = 45.

Or you can try the 10C2 method to get 45.

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Answer 2

Can you explain 10C2 method