The given chart shows the number of students in Class 4, Class 5, Class 6 and Class 7 who got first class, second class and failed in the final examinations.

What is the pass percentage of Class 6?

86.66%

Total number of  students in class 6 = 42 + 10 + 8 = 60

Number of passed students of class 6 = 42 + 10 = 52

Percentage of passed students = \(\frac{52}{60}\) × 100 = 86.67%