Question

If $C_o, C_1,C_2,....C_{15}$ are the binomial coefficients in the expansion of $(1+x)^{15}$ then $\frac {C_1}{C_o} +\frac {2C_2}{C_1}+\frac {3C_3}{C_2} +....+\frac {15C_{15}}{C_{14}}$ is equal to

• A. 32
• B. 64
• C. 128
• D. None of these

Answer 1

Answer: (D)

None of these

Answer 2

Answer (d) None of these