What was the average semester fee charged for M. Sc. course over all the years together?

Answer: Option B

Average semester fee for M. Sc. course over the give years.
$$=\frac{\left(5.8+6.4+10.2+14.6+17.7+20.9\right)\times 1000}{6}$$
$$\begin{array}{rl}& =\frac{75.6\times 1000}{6}\\ & =\frac{75600}{6}\\ & =\text{Rs. }12600\end{array}$$