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Suppose that a student suffering from migraine has a medical history that indicates the following probabilities. The probability that you will have a migraine in

Suppose that a student suffering from migraine has a medical history that indicates the following probabilities. The probability that you will have a migraine in one day is 25%. If she has a migraine one day, the probability that she will have a migraine the next day is 40%. If she does not have a migraine, the probability that she will have a migraine the next day is 20%.

What is the probability that she has a migraine:

a) in only one of two days?

b) at least one of two days?

c) In both days ?

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