Answer:
Option D
Explanation:
Let total number of students of a college be x
Non members students = 40
5% of x = 40
$\frac{x\times5}{100}$=40
$\frac{100\times40}{5}=x$ = 800
Percentage of members of both club = 75%
Number of members of both club = $\frac{75\times800}{100}$ = 600