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If P(n, 5) : P(n-1, 4) = 6 : 1 then...

If P(n, 5) : P(n-1, 4) = 6 : 1 then

A

a) n = 1/2

B

b) n = -1/2

C

c) n = 6

D

c) n = 7/6

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