The pie chart given below shows the number of books of 6 subjects in a bookstore.

The data is presented in the terms of degrees. Number of books of S2 are 252. What are the total number of books of S1 and S5?

Given:
Number of books of S2 = 252

Angle of S2 = 126 degree

Angle of S1 = 54 degree, 

Angle of S5 = 48 degree. 
Solution:
if 126  degree of S2 = 252 

than 1 degree of S2 = $$\frac{252}{126} = 2$$​​
Total angle for S1 + S5 = 54 + 48 = 102 degree 

Number of books of S1 and S5 = 102 × 2 = 204 
Final Answer
So the correct answer is (c)