The state consumers affairs office provided the following information on the frequency of automobile repairs for cars 2 years old or older: 20% of all cars will require repairs once during a given year, 10% will require repairs twice, and 5% will require three or more repairs during the year.
a. What is the probability that a randomly selected car will need no repairs?
b. What is the probability that a randomly selected car will need at most one repair?
c. What is the probability that a randomly selected car will need some repairs?