The bar chart

The bar chart shows the results of the math test. How many percents of pupils achieved approximately better results than the class average?

Diagram: 1-10 pupils, 2-4 pupils, 3-6 pupils, 4-2 pupils, 5-4 pupils.
(lowest results are better)

Correct answer:

p =  53.8462 %

Step-by-step explanation:

n=10+4+6+2+4=26 s=1 10+2 4+3 6+4 2+5 4=64  a=ns=2664=13322.4615  p=100 n10+4=100 2610+4=53.8462%

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