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

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Suppose n children are going to sit, in any order, on 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.


OA D

Source: Magoosh