state gov Karnataka Forest Guard (ಅರಣ್ಯ ರಕ್ಷಕ) Mock Test 2023 Mathematics Permutations and Combinations Permutation Function and its properties

If ^{n - 1}P₃ ∶ ^{n + 1}P₃ = 5 ∶ 12, then n is

1

+7

2

-7

3

-8

4

+8

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