Question

If 100 students are in a class 40 are boys 30 wear glasses 15 are boys that wear glasses what is the probability that a girl will be chose that does not wear glasses

Answer 1

1 in 4 chance

100 students - 40 boys
that means there are 60 girls
30 people wear glasses - 15 boys
that means 15 girls wear glasses
15/60 = 1/4 or 25 %