Question

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?

A 20 Correct Answer Incorrect Answer
B 45 Correct Answer Incorrect Answer
C 55 Correct Answer Incorrect Answer
D 90 Correct Answer Incorrect Answer

Solution

ATQ, we can say that Number of people in the conference = 10 Each person shakes hands with others. Total number of handshakes = 10C2  = (10 × 9)/2  = 45 handshakes.

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