Marks of 50 students out of 50 in an examination for 20 22 31 40 19 17 19 25 29 23 17 24 21 35 find the mean
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sum of observations =20+22+31+40+19+17+19+25+29+23+17+24+21+35
no. of observations =14
mean=sum of observations/no of observations
=342/14
=24.42...
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