Find Probability values using Binomial distribution.
A university found that 20 percent of its students withdraw without completing the introductory statistics course. 20 students registered for a section of the course this term.
a. What is the possibility that two or fewer will withdraw?
b. What is the possibility that exactly four will withdraw?
c. What is the possibility that more than three will withdraw?
d. What is the likely number of withdrawals?