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OpenStudy (anonymous):
There are 28 right-handed students in a class of 31. What is the probability that a student chosen at random will be left-handed?
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OpenStudy (xkehaulanix):
If there are 28 right-handed students, 3 of them are left-handed (assuming none are ambidextrous). So there are 3 possible students in a class of 31 students, with a 3/31 chance of picking one of them.
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