Mr. Miller teaches a class with 15 boys and 5 girls. If he randomly chooses a student from the class, what is the probability that the student chosen is NOT a boy?
A)
.25
B)
.33
C)
.50
D)
.75
.25
B) .33
To find the probability that the student chosen is NOT a boy, we need to find the number of students who are not boys and divide it by the total number of students.
Given that there are 15 boys and 5 girls in the class, the total number of students is 15 + 5 = 20.
The number of students who are not boys is 5 (the number of girls).
Therefore, the probability of selecting a student who is NOT a boy is 5/20 = 1/4 = 0.25.
So the correct answer is A) 0.25.