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
Answers were Sorted based on User's Feedback
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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