Answer:
0.5556 or 55.56%
Step-by-step explanation:
If the probability of getting an A in both tests, P(B), is 0.5, and the probability of getting an A in the first test, P(F), is 0.9, then the probability of getting an A on the second test, P(S) is:
Given that a student has scored an A on the first test, the probability that the student will score an A on the second test is 0.5556 or 55.56%