A local university offers a review course for those who are planning to take the GRE exam. Thirty percent of the people who took the exam had attended the university’s GRE review course. The results of the test showed that 60% of those who attended the review passed the exam, while among those who did not attend the course, only 20% passed the exam. An individual has passed the exam. Knowing this, what is the probability that he attended the review course?
.14
.18
.321
.563
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very high I can't do it wait let me call my brother
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