Question

The value of $2C_0^2+\frac{2^2}{2}{C}_1+\frac{2^3}{2}{C}_2+.....+\frac{2^{11}}{11}{C}_{10}$ is

• A. $\frac{1}{11}(2^{11}-1)$
• B. $\frac{1}{12}(3^{11}-1)$
• C. $\frac{1}{21}(11^3-1)$
• D. $\frac{1}{11}(11^2-1)$

Answer 1

Answer: (B)

Correct answer is (b) $\frac{1}{12}(3^{11}-1)$