SOLUTION: In a class of 25 students, 80% are passing the class with a grade of C or better. If two students are randomly selected from the class, what is the probability that neither student

Question 1189617: In a class of 25 students, 80% are passing the class with a grade of C or better. If two students are randomly selected from the class, what is the probability that neither student is passing with a grade of C or better?
A)0.03 B)0.20 C)0.08 D)0.63 E)0.64
Answer by ikleyn(52792) (Show Source): You can put this solution on YOUR website!
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In a class of 25 students, 80% are passing the class with a grade of C or better.
If two students are randomly selected from the class, what is the probability
that neither student is passing with a grade of C or better?
A)0.03 B)0.20 C)0.08 D)0.63 E)0.64
~~~~~~~~~~~~~~~~~

80% of 25 is 20 students.


So, 20 students are passing the class with a grade of C or better,

and 5 students are passing the class with the lower grade.


Therefore, the probability under the problem's question is


    P =  =  = .    ANSWER

Solved.

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The formula for P is SELF-EXPLANATORY.

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