In a certain class of students, there are 11 boys from Wilmette, 7 girls from Wilmette, 5 boys from Winnetka, 4 girls from Winnetka, 4 boys from Glencoe, and 4 girls from Glencoe. If the teacher calls upon a student to
Answer a question, what is the probability that the student will be a boy?
A) 0.429
B) 0.314
C) 0.571
D) 0.71

Question

Quizplus · Accepted Answer

To find the probability of a student being a boy, we need to add up the number of boys from each town and divide by the total number of students.
Total number of boys = 11 + 5 + 4 = 20
Total number of students = 11 + 7 + 5 + 4 + 4 + 4 = 35
Probability of student being a boy = 20/35 = 0.571. 
Therefore, the best choice is C.

In a Certain Class of Students, There Are 11 Boys