Number of students who are members of both the clubs is:

Solution

Percent of non members = $$100-(75+5+15)=5\%$$

Now, number of non members = $$5\%\equiv40$$

=> $$100\%=\frac{40}{5}\times100=800$$

Thus, total number of students = $$800$$

Number of students who are members of both the clubs = $$\frac{75}{100}\times800$$

= $$75\times8=600$$

=> Ans - (C)

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