Arithmetic Ability
Permutations and Combinations

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Q.

Find the number of subsets of the set {1,2,3,4,5,6,7,8,9,10,11} having 4 elements.

View Answer

Correct choice: D

Explanation:

Here the order of choosing the elements doesn’t matter and this is a problem in combinations. We have to find the number of ways of choosing 4 elements of this set which has 11 elements. This can be done in 11C4 ways = 330 ways
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