The math professor gave the class a set of 12 review problems and told them that the midterm exam would consist of 6 of the 12 problems selected at random. If Mela memorized the solutions to 8 of the 12 problems but could not solve any of the other 4 problems, what is the probability that she got 4 or more problems correct in the exam?

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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The math professor gave the class a set of 12 review problems and told
them that the midterm exam would consist of 6 of the 12 problems selected at random.
If Mela memorized the solutions to 8 of the 12 problems but could not solve any of
the other 4 problems, what is the probability that she got 4 or more problems correct
in the exam? 

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