Question

A math professor finds that when she schedules an office hour for student help, an average of 2.12.1 students arrive. find the probability that in a randomly selected office hour, the number of student arrivals is 11.

Answer 1

poisson distribution with mean m=1.9
P[k] = e^-m *m^k/k!
p[5] = e^-1.9 *1.9^5/5! =0.0309 <----