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JEE MATHEMATICS MCQ: PERMUTATIONS

1 Easy

1 of 1

Application +4 | -1

If there are 62 onto mapping from a set

X

containing

n

elements to the set

Y=\{-1,1\}

, then

n

is equal to:

View answer and explanation

Correct option: C

6

Option C (6) is correct because the number of onto mappings from a set X with n elements to a set Y with 2 elements is

2^n - 2

, which equals 62 when n=6.

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