statistics

what the error is:
a)
Grade Percent Frequency
A 20%
B 45%
C 30%
D 10%
F 5%

(b) The following table summarizes the grade breakdown on an exam in a small statistics class with 10 students.
Grade Percent Frequency
A 30%
B 35%
C 15%
D 20%
F 0%

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asked by John

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