The raw scores of 20 students of Utopia high School who took part in an examination in economics are given below:38,39,12,20,18,28,20,46,34,20 70,64,52,48,64,43,66,53,69,34
a). what is the mean scores of the students mark?
b). how many students passed the examination
c). what percentage of the students failed the examination?
d). how many students scores below the mean score?

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