The probability that event A occurs is 0.4, and the probability that event B occurs is 0.45. If the probability that either event A or event B occurs is 0.6, what is the probability that event B and event B will occur?
Options:
A) 0.25
B) 0.15
C) 0.45
D) 0.5
E) 0.55
P(0.25 or B) = P (0.25) + P(B) - p(a n b)   0.6= 0.4 + p(a n b) + 0.45   P(B) = 0.25   0.25ns : 0.25
<result>A</result>
The probability that event A occurs is 0.4, and the probability that event B occurs is 0.45. If the probability that either event A or event B occurs is 0.6, what is the probability that event B and event B will occur?