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Combinations

2 PYQ across 2 exams · 2015–2024 — the complete chronological timeline of how UPSC has tested this idea, oldest to newest.

EPFO 2015 → ESE 2024
20151 PYQ
EPFOQ90
In a chess tournament, each of the six players will play with every other player exactly once. What is the number of matches that will be pl…
20241 PYQ
ESEQ19
If six people greet each other at a meeting by shaking hands with one another, how many handshakes take place?…
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