Question: Stop that car: A drag racer has two parachutes, a main and a backup, that are designed to bring the vehicle to a stop at

Stop that car: A drag racer has two parachutes, a main and a backup, that are designed to bring the vehicle to a stop at the end of a run. Suppose that the main chute deploys with probability 0.99, and that if the main fails to deploy, the backup deploys with probability 0.98.
a. What is the probability that one of the two parachutes deploys?
b. What is the probability that the backup parachute deploys?

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