Probability Question; There are two tests for a particular antibody.

Question

There are two tests for a particular antibody. Test A gives a correct result 95% of the time. Test B is accurate 89% of the time. If a patient is given both tests, find the probability that

a) both tests give the correct result

b) neither test gives the correct result

c) at least one of the tests gives the correct result

Answer 1

P(A and B)

1 - P(A and B)

P(A or B