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JEE MATHEMATICS MCQ: PERMUTATIONS

1 Easy

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Application +4 | -1

If

a

denotes the number of permutations of

x+2

things taken all at a time,

b

the number of permutations of

x

things taken 11 at a time and

c

the number of permutations of

x-11

things taken all at a time such that

a=182 b c

, the value of

x

is

View answer and explanation

Correct option: B

12

Option D (18) is correct because it solves for x using the given permutation equation.

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