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If Sigma(r=1)^(10) r(r-1) ""^(10)Cr = k....

If `Sigma_(r=1)^(10) r(r-1) ""^(10)C_r = k. 2^9`

A

10

B

45

C

90

D

100

Text Solution

Verified by Experts

The correct Answer is:
B
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