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Suppose n children is going to sit, in any order, on a row of n chairs. What is the value of n?

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by BTGmoderatorLU » Wed Jun 02, 2021 9:59 am

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A

B

C

D

E

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Source: Magoosh

Suppose n children are going to sit, in any order, in a row of n chairs. What is the value of n?

1) In this row, there are 5040 possible arrangements of the n children

2) If one child leaves, and one chair is removed from the row, there would be 4320 fewer arrangements of the remaining children

The OA is D
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Source: — Data Sufficiency |