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(9) distinct players are to stand in a row. The captain must always be to the left of the goalkeeper, with any number of people between them. How many arrangements are possible?

Answer and explanation

Correct answer: (181440)

In total (9!) orders, the two relative orders of captain and goalkeeper are equally likely, so half are valid. If relative order is fixed, divide by (2).

Related tags

PermutationsClass11ExpertRelative OrderPermutations And CombinationsMathematicsClass 11 Mcq

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