The following table gives the distribution of total household expenditure (in rupees) of manual workers in a city. Expenditure: (in Rs.)          100-150                  150-200            200-250                  250-300            300-350                  350-400            400-450                  450-500 Frequency:             24         40                  33         28         30                  22         16         7 Find the average expenditure (in Rs.) per household.

Explanation

`d_1=x_1−275`


`u_1=50x_1−275`


Let the assumed mean be,


A=275


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