Question

In two successive years, 100 and 200 students of a school appeared at the final examination. Respectively 80% and 60% of them passed. Find the cumulative passing percentage in 2 years. 
1. 50%
2. 60%
3. 66.67%
4. 65%

Answer 1

Correct Answer - Option 3 : 66.67%

GIVEN:

In two successive years, 100 and 200 students of a school appeared at the final examination. Respectively 80% and 60% of them passed.

FORMULA USED:

X% of Y = Y × X/100

CALCULATION:

Total number of students appeared in 2 years = 100 + 200 = 300

And

Total number of passed students in 2 years = 100 × 0.8 + 200 × 0.6

= 80 + 120

= 200

Hence,

Required percentage = [200/300] × 100 = 66.67%