Interview Question

IT Developer Interview

-New York, NY

FDM Group

How many unique handshakes if each person in a group of 10 give handshakes out to each and every other individual. (a) 100 (b) 50 (c) 45 (d) 20 (e) 10

Answer

Interview Answers

5 Answers

3

true, or 9+8+7+...+2+1

Dex on

8

45. Imagine it as a polygon of side 10. Or draw out triangle, square, pentagon, and see the pattern yourself, if you don't know the algorithm.

Anonymous on

1

Or just do: (10 Combination 2) = 10!/(2!8!) = 45

rhan on

0

n(n+1)/2 Where n =9 Answer: 45

Aram Yayloyan on

0

45

Anonymous on

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