Question

In a class of 40 students, 60% are girls. 50% of the girls and 25% of the boys wear glasses. How many students wear glasses?

Answer 1

Answer: 16 students wear glasses

Answer 2

16 students

Explanation:

For girls that wear glasses:

40 students x 0.6(60%) = 24 girls

24 girls x 0.5(50%) = 12 girls that wear glasses

For boys that wear glasses:

40 students x 0.4(40%) = 16 boys

16 boys x 0.25(25%) = 4 boys that wear glasses

12 girls + 4 boys = 16 students in total that wear glasses

Hope that helps :)