Mathematics

Guest

15 June, 05:58

Of five physical therapists that work at a rehab center, three have master's degrees and two have doctorates. Each therapist is equally likely to be assigned to a patient on any given visit. If Tom has five sessions scheduled in the next two weeks, find the probability that

a) He gets a therapist with a doctorate twice

b) He gets a therapist with a doctorate less than two times.