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Solutions
The total savings = Rs.1,20,000
Now there are two possibilities.
Case (1):
Mr.Sharma earns twice as much as Mrs. Sharma.
then According to question,
10x(0.1)+20x(0.2)=1,20,000
x=24,000
∴ Entertainment = 24,000×2 = Rs.48,000
Case (2):
If Mr. Sharma earns half as much as Mrs. Sharma.
10x(0.1)+ 5x(0.2) = 1,20,000
⇒2x = 120000 ⇒ x = 60,000
∴ Expenses on entertainment = Rs.1,20,000
∴ Monthly expenses in the first case is Rs.4000 and in the second case is Rs.10,000.