A student has an exam in a discrete mathematics class tomorrow. The exam is divi

Question

A student has an exam in a discrete mathematics class tomorrow. The exam is divided into two parts. The first part consists only of true-false questions and the second part consist of only multiple-choice questions. She estimates that the probability of getting B or better on Part 1 is 0.8 and the probability of getting B or better of Part 2 is 0.6. She also estimates that the probability of getting B or better on both parts is 0.5.

a) What is the probability of getting B or better on Part 1 if she got a B or better on Part 2?

b) What is the probability of

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