JEE MATHEMATICS MCQ: PERMUTATIONS

1 Easy

1 of 1

Application +4 | -1

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\;bc

, then the value of

x

View answer and explanation

Correct option: B

Option A (12) is correct because it is the value of x that satisfies the given permutation equation after simplification and solving the quadratic equation.

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