¶ 1985 AMC8 Problem 5
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Problem:
The bar graph shows the grades in a mathematics class for the last grading period. If and are satisfactory grades, what fraction of the grades shown in the graph are satisfactory?
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Answer Choices:
A.
B.
C.
D.
E.
Solution:
By reading the graph, there are , and . Thus the fraction of satisfactory grades is = = .
By reading the graph, of the grades are not satisfactory so of the grades are satisfactory.
Answer: .
The problems on this page are the property of the MAA's American Mathematics Competitions