In a classroom there are 100 students, of whom 40 are boys, 30 wear glasses, and 15 are boys who wear glasses. If one student from the class is randomly selected what is the probability that the student will be a girl who does not wear glasses?
There are 60 girls in the classroom, of whom 15 wear glasses. So, there are 45 girls who do not wear glasses.
The probability of selecting a girl who does not wear glasses can be calculated as follows:
Probability = (Number of girls who do not wear glasses) / (Total number of students)
Probability = 45/100 = 0.45
Therefore, the probability of selecting a girl who does not wear glasses is 0.45 or 45%.