Q. 154.3( 12 Votes )
Find the mean mar
Answer :
We will find the mean marks per student using Assumed - mean method, where A = Assumed mean.
We have got
A = 25, Σfi = 100 & Σfidi = 300
∵ mean is given by
⇒ 
⇒ 
Thus, mean is 28.
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