Question
In 2018, the income-to-expenditure ratio of Vishal was
5:3. The following year, his income increased by 10% while his expenditure rose by 15%. Determine Vishal's income in 2018 if he managed to save Rs. 820 in 2019.Solution
Income = Expenditure + saving 5x × 110% -3x × 115% = 820 5.5x – 3.45x = 820 2.05x = 820 x = Rs. 400 Income of Vishal in 2018 = 400 × 5 = Rs. 2,000 Hence, option c.
Select the number from among the given options that can replace the question mark (?) in the following series.
64, 60, 52, 40, ?, 4
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