Q. 224.9( 9 Votes )

The table below s

Answer :

We may calculate class marks (xi) for each interval by using the relation

xi =


Class size = 50


Now taking 225 as assumed mean we can calculate as follows:



Mean (x̅) = A + * h


= 225 + * 50


= 225 – 14 = 211


So mean expenditure on food is 211


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