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)0.71
B)0.429
C)0.571
D)0.314

Question

Quizplus · Accepted Answer

There are a total of 35 students (11 boys + 7 girls from Wilmette, 5 boys + 4 girls from Winnetka, 4 boys + 4 girls from Glencoe). The total number of boys is 20 (11 from Wilmette, 5 from Winnetka, 4 from Glencoe). The probability of selecting a boy is 20/35 = 0.571.

In a Certain Class of Students, There Are 11 Boys