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If the number of subsets with 8 elements...

If the number of subsets with 8 elements from the set `A={a_(1),a_(2),a_(3),.........a_(n)},nge8` is five times the number of such subsets containg `a_(4)`, then

A

32

B

40

C

45

D

0

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The correct Answer is:
B
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