In a class, there are 'z' students. Out of them 'x' are boys. What part of the class is composed of girls ?

A. $$\frac{{x}}{{y}}$$

B. $$\frac{{z}}{{x}}$$

C. 1 - $$\frac{{x}}{{z}}$$

D. $$\frac{{x}}{{z}}$$ - 1

Answer: Option C

Solution(By Examveda Team)

Total students = z
Total boys = x
Total girls = z - x
⇒ $$\frac{{{\text{Number of girls}}}}{{{\text{Total students}}}}$$
= $$\frac{z - x}{{z}}$$
= 1 - $$\frac{x}{{z}}$$