Question 1010834
for 2, 20C2*0.06^2*0.94^18=0.2246
for 0, it is 0.94^20=0.2901
for 1 it is 20*0.06*0.94^19=03703
The probability for those 3 outcomes is 0.8850
The probability for 3 or more is the complement or 0.1150.