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The probability that a patient recovers from a stomach disease is .8. Suppose 20 people are known to have contracted this disease. What is the

The probability that a patient recovers from a stomach disease is .8. Suppose 20 people are known to have contracted this disease. What is the probability that

a. exactly 14 recover?

b. at least 10 recover?

c. at least 14 but not more than 18 recover?

d. at most 16 recover?

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