Originally Posted by **swoopesjr01**

Students who read their statistics text have a .98 probability of passing the course. Those who don't have a .85 probability of failing. If 70% of the students do the readings, then:

a) What is the probability that a student will pass the course?

b) If a student were to pass, what would the probability have been that he or she did the readings?

a) .371

b) .398

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This is what I have come up with so far:

Let P = pass course and T= read text

(P|T) = 0.98 so P(P'|T) = 0.02

(P'|T') = 0.85 so (P|T') = 0.15