Question 1182867
Fewer than 5 customers.
Do probabilities of  5,6,7 and subtract those 3 probabilities from 1.
for 5: 7C5*0.85^5*0.15^2=0.2097
for 6: 7*0.85^6*0.15=0.3960
for 7: 0.85^7=0.3206
they add to 0.9263
so the answer is the complement or 0.0737