Posted by **Lynn** on Monday, April 8, 2013 at 7:33pm.

A multiple choice quiz consists of 20 questions, each with 3 possible equally likely answers. If a student guesses at the answer to each question, then the mean number of correct answers selected by the student is?

- stat probability -
**Anonymous**, Thursday, March 17, 2016 at 11:19pm
ddd

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