The manager at the local auto shop has found that the
probability that a car brought into the shop requires an oil change
is 0.79, the probability that a car brought into the shop requires
brake repair is 0.21, and the probability that a car requires both
an oil change and brake repair is 0.15. For a car brought into the
shop, determine the probability that the car will require an oil
change or brake repair.
The probability that the car requires an oil change or brake
repair is ___