Q. 284.0( 5 Votes )
Weight of 60 eggs
Answer :
We will find the mean weight using step - deviation method, where A = Assumed mean and h = length of class interval.
Here, let A = 92 and h = 5
Since, the class intervals are inclusive type, we’ll first convert it into exclusive type by extending the class interval from both the ends.

We have got
A = 92, h = 5, Σfi = 60 & Σfiui = - 19
∵ mean is given by
⇒
⇒
Thus, mean weight is 90 g.
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