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JEE MATHEMATICS MCQ: PERMUTATIONS

1 Easy

1 of 1

Application +4 | -1

Let

A

be the set of 4-digit numbers

a_1 a_2 a_3 a_4

, where

a_1 > a_2 > a_3 > a_4

, then

n(A)

is equal to

View answer and explanation

Correct option: C

210

Option C (210) is correct because it represents the number of ways to choose 4 distinct digits from 10.

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