A shipping firm keeps two vehicles in readiness for local deliveries. Because of demands on their time, and the frequency of mechanical failure, the probability that a particular vehicle will be available when needed is 0.9. The availability of one vehicle is independent of the other. a. If both vehicles are wanted at the same time, what is the probability that both will be available? b. If both vehicles are wanted at the same time, what is the probability that neither will be available? c. If a vehicle is wanted at a certain time, what is the probability that a vehicle will be available?
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