Question

2 From 1 Mesra has 40 students and 25 of them are boys 8 boys and 3 of the girls in the class are chosen to take part in a Teacher's Day presentation Find the number of students selected for the presentation​

Answer 1

Calcualate 40% (0.40) times 20 to get that there are 8 boys in the class. The rest must be girls, so 20 - 8 gives you 12 girls. 25% (0.25) times the 8 boys gives you that 2 of the boys wear glasses. 50% (0.5) times the 12 girls tives you that 6 girls wear glasses. Add together the 2 boys and the 6 girls that wear glasses to get that a total of 8 students wear glasses.

Explanation: