单选题

The probability that event A occurs i...

Question

The probability that event A occurs is 0.4, and the probability that events A and B both occur is 0.25. If the probability that either event A or event B occurs is 0.6, what is the probability that event B will occur?

A. 0.15

B. 0.35

C. 0.45

D. 0.50

E. 0.55