In a class of 20 students, 40% are boys. 25% of the boys and 50% of the girls wear glasses. How man students wear glasses?

Question

Mathematics

Adolfo Compton

8 August, 15:56

In a class of 20 students, 40% are boys. 25% of the boys and 50% of the girls wear glasses. How man students wear glasses?

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Dominique Fleming · Answer 1

20 students.

40% are boys. (40/100) * 20 = 0.4 * 20 = 8 boys.

Girls = 20 - 8 = 12 girls.

25% of the boys wear glasses. = (25/100) * 8 = 0.25*8 = 2 boys wear glasses.

50% of the girls wear glasses. = (50/100) * 12 = 0.50*12 = 6 girls wear glasses.

Total students that wear glasses = 2 + 6 = 8 students.

8 students wear glasses.