ABC26GN3099 · Ratio and Proportion
Subject: General Aptitude · Chapter: Ratio and Proportion · Exam: 2010 · Marks: · Difficulty:
The ratio of income and expenditure of a person is 11 : 10. If he saves ₹ 9000 per annum, his monthly income is (S.S.C., 2010)
(a)₹ 8000
(b)₹ 8250
(c)₹ 8500
(d)₹ 8800
Answer
Explanation
Let income $=₹ 11 x$ and expenditure $=₹ 10 x$. Then, $11 x-10 x=9000 \Rightarrow x=9000$. Annual income $=11 x=₹(11 \times 9000)=₹ 99000$. $$\text { ∴ Monthly income }=₹\left(\frac{99000}{12}\right)=₹ 8250 .$$
Explanation as extracted from the printed page; notation may be imperfect.
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