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The following table gives the distributi...

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.

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