Suppose that past history show that 60% of students prefer Brand C cola. A sample of 5 students is selected. 

What is the probability that exactly 3 of the 5 students selected will prefer brand C

Suppose that past history show that 60% of students prefer Brand C cola. A sample of 5 students is selected. 

What is the probability that at least 3 of the 5 students selected will prefer brand C?

Suppose that past history show that 60% of students prefer Brand C cola. A sample of 5 students is selected. 

What is the probability that at most 2 of the 5 students selected will prefer brand C?