In a class of 40 students, 22 are women, 10 are earning an A, and 7 are women that are earning an A. If a student is randomly selected from the class, find the probability that the student is a woman or earning an A.
A) .625
B) .8
C) .975
D) .25

Question

Quizplus · Accepted Answer

The probability that a student is a woman or earning an A is calculated using the formula P(W or A) = P(W) + P(A) - P(W and A). Here, P(W) = 22/40, P(A) = 10/40, and P(W and A) = 7/40. So, P(W or A) = 22/40 + 10/40 - 7/40 = 25/40 = 0.625.

In a Class of 40 Students, 22 Are Women, 10