The bar chart

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

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

Correct result:

p =  53.8462 %

Solution:

n=10+4+6+2+4=26  a=1 10+2 4+3 6+4 2+5 4n=1 10+2 4+3 6+4 2+5 426=32132.4615  p=100 10+4n=100 10+426=70013=53.8462%



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