collect the marks of 10 of my classmates in two subjects. Estimate the arthimetic mean of marks in each subject and verify them in by actual calculation 62,62,55,50,48,64,39,50,57,50 assumed mean is 50
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(62+62+55+50+48+64+39+50+57+50)/10
=537/10
=53.7 Ans
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