Question 1025834
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x=total income
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0.20x=rent expense, 0.80x=the rest  
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0.70(0.80x)=0.56x=household expenditure
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0.20x+0.56x=0.76x=total expenses
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total income - total expenses = amount of savings
x - 0.76x = 0.24x
0.24x=Rs.1800 (amount of savings)
x=Rs.7500
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ANSWER: Total income is Rs.7500