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Riddles, brain puzzles and mathematical problems

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Riddles, brain puzzles and mathematical problems
Froge Offline
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RE: Riddles, brain puzzles and mathematical problems

A teacher gives his students 10 problems and tells them that 5 of those 10 problems will be on the exam, and they will be the only questions. A student memorizes the solutions for 7 of the 10 problems. He does not know how to do any of the other 3. What is the probability the student gets at least 4 questions correct on the exam?
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(This post was last modified: 04-04-2014, 07:32 PM by Froge.)
03-26-2014, 06:42 AM
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RE: Riddles, brain puzzles and mathematical problems - by Froge - 03-26-2014, 06:42 AM



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