Question

The ratio of boys and girls in a class is 5:3. If 16% of the boys and 8% of the girls failed in an examination, then find the percentage of students passed.

Answer 1

Answer:

87%

Step-by-step explanation:

Let the number of boys be 5x and girls 3x.

Number of boys failed = 16/100 * 5x = 0.80x

Number of girls failed =  8/100 * 3x  =  0.24x

Number of students passed = (5x+3x) - 1.04x = 8x - 1.04x = 6.96x

Percentage of students passed = 6.96x/8x * 100 = 87%.