Pomegranates are sold in crates of 10. It is estimated that about 25% of the pomegranates in a crate are bad.
(a) What's the expected number of good pomegranates in a crate?
(b) What's the standard deviation of the number of good pomegranates in a crate?
(c) What's the probability that there are at least 8 good pomegranates in a crate?