Past insurance company audits have found that 2 percent of dependents claimed on an employee's health insurance

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Past insurance company audits have found that 2 percent of dependents claimed on an employee's health insurance actually are ineligible for health benefits. An auditor examines a random sample of 7 claimed dependents.
(a) What is the probability that all are eligible?
(b) That at least one is ineligible?
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