Answer:
0.2775
Step-by-step explanation:
The probability that the car will breakdown while still under warranty
= 0.15
The probability that the car will not breakdown while still under warranty
=1-0.15 = 0.85
the probability that at least one will have a major break down in the warranty period = 1 - probability that none have a major break down within the warranty period = 1 - 0.85*0.85 = 1- 0.7225 = 0.2775