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If Sigma(i=1)^(20) ((""^(20)C(i-1))/(""^...

If `Sigma_(i=1)^(20) ((""^(20)C_(i-1))/(""^(20)C_(i)+""^(20)C_(i-1)))^(3)=(k)/(21)`, then k equals

A

200

B

50

C

100

D

400

Text Solution

Verified by Experts

The correct Answer is:
C
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