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Question
Find n if 6P2 = n 6C2
Sum
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Solution
6P2 = n 6C2
∴ `(6!)/((6 - 2)!) = "n" (6!)/(2!(6 - 2)!)`
∴ `(6!)/(4!) = "n"(6!)/(2!4!)`
∴ n = 2!
= 2 × 1
= 2
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