A large department store offers online ordering. When a purchase is made online, the customer can select one of four different delivery options: expedited overnight delivery, expedited second-business-day delivery, standard delivery, or delivery to the nearest store for customer pick-up. Consider the chance experiment that consists of observing the selected delivery option for a randomly selected online purchase. Suppose that the probability of an overnight delivery selection is 0.1, the probability of a second-day delivery selection is 0.3, and the probability of a standard-delivery selection is 0.1. Find the following probabilities. (a) Find the probability that a randomly selected online purchase selects delivery to the nearest store for customer pick-up. (b) Find the probability that the customer selects a form of expedited delivery. (c) Find the probability that either standard delivery or delivery to the nearest store is selected.

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