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JEE MATHEMATICS MCQ: COMBINATIONS

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Application +4 | -1

S=\{1,2,3, \ldots, 20\}

is to be partitioned into four sets

A

,

B, C

and

D

of equal size. The number of ways it can be done, is

View answer and explanation

Correct option: C

\frac{20 !}{(5 !)^4}

Option C (

\frac{{20 !}}{{(5 !)^4}}

) is correct because it represents the number of ways to partition a set of 20 elements into four equal-sized subsets.

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n