At the end of a business conference all the ten people
present shake hands with each other once. How many
handshakes will there be altogether?
(1) 90
(2) 55
(3) 45
(4) 20
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Answer / sudip kanti das (shonta)
EXPLANATION :-
FORMULA IS
N-1 X (N/2).
NOW PUTTING VALUE
10-1 X (10-2)= 9 X 5 = 45.
SO ANSWER IS = 45
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