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1. $\frac{1}{6!} + \frac{1}{7!} = \frac{x}{8!}$

A. 64
B. 64
C. 64
D. 64

Answer: Option A

Explanation:

x/(8×7×6!)= 1/6! + 1/(7×6!)

Or, x/56= 1+ 1/7

Or, x= 56+8

So, x= 64

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