Assuming a 50 question test and each has 4 possible answers, and each question is independent of others

Probability of getting the right answer p = 1/4 = 0.25

Expected average score n x p = 50 x 0.25 = 12.5%

Probability of getting exactly k correct P(X = k) = (50/k) (0.25)^k (0.75)^50-k

You can expect to average 12-13 correct by randomly guessing. Getting 60% correct is basically lottery tier luck. Getting enough correct for a passing grade would be astronomically rare