# Thread: Rick and His Test

1. ## Rick and His Test

The probability of Rick getting an A on any test is 2/3. Find the probability that he earns an A on exactly 3 of 4 tests.

2. Use the binomial distribution with n = 4, x = 3 and p = 2/3

3. ## ok........

Originally Posted by nzmathman
Use the binomial distribution with n = 4, x = 3 and p = 2/3
Thanks for the tip.