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(C(1))/(C(0))+(2.C(2))/(C(1))+(3.C(3))/(...

`(C_(1))/(C_(0))+(2.C_(2))/(C_(1))+(3.C_(3))/(C_(2))+ . . .+(20.C_(20))/(C_(19))=`

A

120

B

210

C

180

D

240

Text Solution

Verified by Experts

The correct Answer is:
B
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