Question 1193130
a, it is 20C16*0.85^16*0.15^4=0.1821
b. At least 16 is 16-20 with probability 0.8298 2d VARS to 1-binomcdf(20,0.85,15); the 1- means we want the right side of the distribution up to 15.
c. $1500*0.8298=$1244.77