Reasoning Class 5 Possible Combinations

Asked by AKSHAY GURU VARADHARAJAN · SRI CHAITANYA TECHNO SCHOOL, JAYANTI NAGAR.

At a birthday party, there are 6 friends. If every person shakes hands with every other person exactly once, how many total handshakes will take place?

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A 30
B 15
C 12
D 36

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Answer: B. 15

Simple Explanation: The first person shakes hands with 5 others. The second person has already shaken hands with the first, so they shake hands with 4 new people, and so on (5 + 4 + 3 + 2 + 1 = 15)

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At a birthday party, there are 6 friends. If every person shakes hands with every other person exactly once, how many total handshakes will take place?

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