A class has five sections that have 25, 30, 40, 45 and 60 students, respectively. The pass percentage of these section are 20%, 30%, 35%, 40% and 100% respectively. The pass percentage of the entire class is:

A. 87%

B. 63%

C. 53%

D. 79%

Answer: Option C

Solution(By Examveda Team)

Number of students of all sections = 25, 30, 40, 45, 60
$$\eqalign{ & 25 \times \frac{1}{5} = 5 \cr & 30 \times \frac{3}{{10}} = 9 \cr & 40 \times \frac{7}{{20}} = 14 \cr & 45 \times \frac{2}{5} = 18 \cr & 60 \times \frac{{100}}{{100}} = 60 \cr} $$
106 → Passed student
Total student = 200
$${\text{Pass}}\% = \frac{{106}}{{200}} \times 100 = 53\% $$