Question

The probability that Paula passes Mathematics is 2/3, and the probability that she passes English is 4/9. If the probability that she passes both courses is 1/4, what is the probability that she will pass at least one course?

Answer 1

31/36

Explanation:

P(E or M) = P(E) + P(M) - P(E & M)

= (2/3) + (4/9) - (1/4)

= 31/36