What was the average number of candidates appeared from zone T over all the years together?

Answer: Option D

Average number of candidates appeared from T all over the years
$$\begin{array}{rl}& =\frac{\left(6.2+6.2+6.4+7.8+9.9+11.8\right)\times 100}{6}\\ & =\frac{48.3\times 100}{6}\\ & =\frac{4830}{6}\\ & =805\end{array}$$