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JEE MATHEMATICS MCQ: PERMUTATIONS

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Application +4 | -1

The number of permutations of

n

different objects taken

r(\geq 3)

at a time which include 3 particular objects, is

View answer and explanation

Correct option: D

{ }^r P_3,{ }^{n-3} P_{r-3}

The correct answer is D (

{ }^r P_3,{ }^{n-3} P_{r-3}

) because it represents the number of ways to arrange 3 particular objects in r places and then arrange the remaining objects.

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