Risky drivers: An automobile insurance company divides customers into three categories: good risks, medium risks, and poor risks. Assume that of a total of 11,173 customers, 7768 are good risks, 2457 are medium risks, and 948 are poor risks. As part of an audit, one customer is chosen at random. Round your answers to four decimal places if necessary.

(a) What is the probability that the customer is a good risk?

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