Being a lit. student who doesn't even really know what all the math signs are, I have a question. It is probably super easy for anyone with q math iq higher than my room-temperature one.

The scores of students on ACT college entrance exams in recent years have had a mean of $\mu = 18.6$ and a standard deviation of $5.9$. Assuming that admitted students from a college have the same mean and standard deviation, find the probability that $50$ randomly chosen students would have a sample mean higher than $20$.