The total percentage of members in the club is 100%. Given that 60% are males, the rest are females.

Given that 60% are males, the rest are females.

$$\text{Percentage of females} = 100\% - \text{Percentage of males}$$ $$\text{Percentage of females} = 100\% - 60\%$$ $$\text{Percentage of females} = \boxed{40\%}$$

The percentage of males is 60%.

$$\text{Number of males} = \frac{\text{Percentage of males}}{100} \times \text{Total members}$$ $$\text{Number of males} = \frac{60}{100} \times 200$$

$$\text{Number of males} = 0.60 \times 200$$ $$\text{Number of males} = \boxed{120}$$

From part (a), the percentage of females is 40%.

$$\text{Number of females} = \frac{\text{Percentage of females}}{100} \times \text{Total members}$$ $$\text{Number of females} = \frac{40}{100} \times 200$$ $$\text{Number of females} = 0.40 \times 200$$ $$\text{Number of females} = 80$$

Calculate the number of students.

$$\text{Number of students} = \frac{\text{Percentage of females who are students}}{100} \times \text{Number of females}$$ $$\text{Number of students} = \frac{25}{100} \times 80$$

$$\text{Number of students} = 0.25 \times 80$$ $$\text{Number of students} = \boxed{20}$$