You may need to use the appropriateappendix tableortechnologyto answer this question. Reference text is essentials of statistics for business and economics 9e.

A university found that20% of its students withdraw without completing the introductory statistics course. Assume that20 studentsregistered for the course. (Round your answers to four decimal places.)

(a)

Compute the probability that 2 or fewer will withdraw.

(b)

Compute the probability that exactly 4 will withdraw.

(c)

Compute the probability that more than 3 will withdraw.

(d)

Compute the expected number of withdrawals.