A university found that 20 percent of its students withdraw without completing the introductory statistics course. Assume that 20 students registered for the course A. Do these 20 students constitute...

A university found that 20 percent of its students withdraw without completing the introductory statistics course. Assume that 20 students registered for the course

A.  Do these 20 students constitute a binomial experiment? If yes, please justify by differentiating between success and failure

B.  ompute the probability that 2 or fewer students will withdraw

C.  Compute the probability that no more than 3 students will withdraw

*Please solve using the probability of successes and failures.  For example,
Notation

N=number of trials

P=Probability of success

Q=Probability of failure

*My professor told us not to use the Binomial Distribution Formula but instead to use  what's called a Binomial table*

*Please do not solve using Microsoft Excel.  My professor is not teaching using excel.  I would like to see the steps taken to getting the solution for my own reference to study.*