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Which word is the best signal to treat ⁿCᵣ as an unordered selection?

Answer and explanation

Correct answer: Committee

A committee is a group formed by selecting members, and the order in which those members are listed or chosen does not change the committee. Therefore combinations, written as ⁿCᵣ, are used for this situation. If A, B and C form a committee, the sets ABC, BCA and CAB represent the same committee. Option C is correct. A rank or an arrangement normally depends on position, so permutations are more appropriate there. A password also depends on the order of its characters and may involve repetition, so it is not an ordinary combination situation. The key governing idea is that combinations count selections where order is irrelevant, whereas permutations count ordered arrangements.

Related tags

CombinationUnordered SelectionKeyword ApplicationCombinationsPermutations And CombinationsMathematicsClass 11 Mcq

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