Q239. I need to take a certification exam this year. The exam cost is $200. There is a prep course for the exam, but I don't know if I need it or not. It costs $300 and if one takes it, one is certain to pass the exam. If I do not take the prep course there is a 50% chance of passing and a 50% chance of failing in which case I'd have to take the prep course anyway and then retake the test (total cost = prep course + twice the exam fee). Should I take the prep course??

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