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JEE MATHEMATICS MCQ: PERMUTATIONS

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Number of permutations of

n

different objects taken

r(\geq 3)

at a time which includes 3 particular objects is

View answer and explanation

Correct option: D

{ }^{\prime} P_{3} \times{ }^{n-3} P_{r-3}

Option D (

{ }^{r} P_{3} \times{ }^{n-3} P_{r-3}

) is correct because it accounts for selecting and arranging the remaining objects after including the 3 particular ones.

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