The probability a student will pass Test 1 is4/5.3/4

The probability that he will pass Test 2 is.2/3

The probability that he will pass both tests is.

A.)What is the probability that he passes at least one test?

B.)What is the probability that he fails both tests?

(4/5) + (3/4) = (31/20) - (12/20) = 19/20

A.)

B.)(1/5) x (1/4) = 1/20

Please correct me if I'm wrong, thanks!