The following pie-chart indicates the monthly domestic budget of a family:
where A = Food: B = Conveyance; C = Clothing: D = House Rent: E = Miscellaneous Expenses:
      F = Saving.
If the monthly saving of the family is Rs. 4500, then the monthly income of the family is:
We know
A+B+C+D+E+F =100
So we get F = 15%
Now let income be I
so we get I(0.15) = 45000
We get
I = 30,000
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