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review book A advertises an average SAT gain of 40 points wtih a standard deviation of 12 points, and review book B claims an average SAT gain of 35...

review book A advertises an average SAT gain of 40 points wtih a standard deviation of 12 points, and review book B claims an average SAT gain of 35 points with a standard deviation of 15 points. assuming both assertions are correcting and assuming normal distributions, which review book is more likely to result in an SAT gain over 60 points?

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