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From (10) players (4) players are to be selected. One captain is already fixed and must not be selected. How many ways are there?

Answer and explanation

Correct answer: 126

The fixed captain is not to be included in the selection, so only 9 players are available. The number of ways to select 4 of them is
\(\binom{9}{4}=
\frac{9!}{4!5!}=126
\). The value 210 is
\(\binom{10}{4}\), which would result if the captain were not excluded. Exam tip: First remove any person who is explicitly excluded from the total number of choices.

Related tags

CombinationsPermutations And CombinationsClass 11Team SelectionBinomial CoefficientMathematicsClass 11 Mcq

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