A local bank reports that 80% of its customers maintain a checking account, 60% have a savings

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A local bank reports that 80% of its customers maintain a checking account, 60% have a savings account, and 50% have both.
1. If a customer is chosen at random, what is the probability the customer has either a checking or a savings account?
2. If a customer is chosen at random, what is the probability the customer does not have either a checking or a savings account?
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