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Permutations

3 PYQ across 3 exams · 2022–2025 — the complete chronological timeline of how UPSC has tested this idea, oldest to newest.

CAPF 2022 → ESE 2022 → CISF 2025
20222 PYQs
CAPFQ41
There is a group of 5 people among which there is one couple. In how many ways can these 5 people be seated in a row having 5 chairs if the …
ESEQ68
A library has two books each having three copies and three other books each having two copies. In how many ways can all these books be arran…
20251 PYQ
CISFQ8
The number of four-digit even numbers formed by the digits 0, 2, 4, 6, 8 without repetition is :…
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