A frequency

A frequency table of grades has five classes (A, B, C, D, F) with frequencies of 2,14,13,8 and 1 respectively. Using percentages, what are the relative frequencies of the five classes?

Correct answer:

p1 =  5.2632 %
p2 =  36.8421 %
p3 =  34.2105 %
p4 =  21.0526 %
p5 =  2.6316 %

Step-by-step explanation:

f1=2 f2=14 f3=13 f4=8 f5=1  s=f1+f2+f3+f4+f5=2+14+13+8+1=38  p1=100 sf1=100 382=19100%=5.2632%
p2=100 sf2=100 3814=19700%=36.8421%
p3=100 sf3=100 3813=19650%=34.2105%
p4=100 sf4=100 388=19400%=21.0526%
p5=100 sf5=100 381=1950%=2.6316%

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