Auniversity claims that 80% of its basketball players get degrees. an investigation examines the fate of all 20 players who entered the program over a period of several years that ended six years ago. of these players, 11 graduated and the remaining 9 are no longer in school. if the university's claim is true, the number of players among the 20 who graduated should have the binomial distribution with n = 20 and p = 0.8. use the binomial probability formula to answer the question, what is the probability that not all of the 20 graduate?