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JEE MATHEMATICS MCQ: PERMUTATIONS

1 Easy

1 of 1

Application +4 | -1

If

{ }^{{n}+2} C_3={ }^{{n}+3} P_2-20

, then

n

is equal to:

View answer and explanation

Correct option: D

3

Option D (3) is correct because substituting n=3 into the given equation satisfies the equality after simplifying the combinations and permutations.

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