If \(\mathop \sum \limits_{i = 1}^{20} {\left( {\frac{{{}_\;^{20}{C_{i – McqOptions

MCQOPTIONS

1.	If \(\mathop \sum \limits_{i = 1}^{20} {\left( {\frac{{{}_\;^{20}{C_{i - 1}}}}{{{}_\;^{20}{C_i} + {}_\;^{20}{C_{i - 1}}}}} \right)^3} = \frac{k}{{21}}\), then ‘k’ is equal to:
A.	400
B.	50
C.	200
D.	100
Answer» E.

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