Each of 4 people is presented with gourmet coffee and ordinary coffee and asked to identify the gourmet coffee. None of the 4 can really tell the difference and are merely guessing.

Question

a.What is the probability that exactly 2 of the 4 correctly identify the gourmet coffee?

b.What is the probability that at least 2 of the 4 correctly identify the gourmet coffee?

c.What is the probability that at most 1 out of the 4 correctly identify the gourmet coffee?