Question : The income of a company increases 20% per year. If the income is Rs. 26,64,000 in the year 2012, then its income in the year 2010 was:
Option 1: Rs. 28,55,000
Option 2: Rs. 18,50,000
Option 3: Rs. 28,20,000
Option 4: Rs. 21,20,000
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Correct Answer: Rs. 18,50,000
Solution : Let the income in $2010$ be Rs. $P$. Given: $R = 20$% and Income of year $2012 = 26,64,000$ Income after $t$ years after 2010 from $P$ amount of money and $R$ Rate of interest = $P[1 + \frac{R}{100}]^t$ Income in $2012 = P[1 + \frac{R}{100}]^2$ ⇒ $ 2664000 = P[1+\frac{20}{100}]^2$ ⇒ $ 2664000 = P(\frac{6}5)^2$ ⇒ $P = 1850000$ Hence, the correct answer is Rs. 18,50,000.
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Question : Ram Babu donated 3% of his income to a charity and deposited 12% of the rest in the bank. If he has Rs. 12,804, then his income was:
Option 1: Rs. 17,640
Option 2: Rs. 15,000
Option 3: Rs. 7,500
Option 4: Rs. 14,550
Question : The compound interest on Rs. 12000 for 9 months at 20% per annum, interest being compounded quarterly is:
Option 1: Rs. 1,750
Option 2: Rs. 2,089.70
Option 3: Rs. 1,891.50
Option 4: Rs. 2,136.40
Question : The salary of an employee increases consistently by 20% every year. If his salary today is Rs. 14,000, what will be his salary after 3 years?
Option 1: Rs. 24,192
Option 2: Rs. 31,200
Option 3: Rs. 42,344
Option 4: Rs. 31,220
Question : The rate of Simple interest per annum of the bank decreased from 5% to $3\frac{1}{2}$% and the annual income of a person from interest was less by Rs. 105. The sum deposited at the bank was:
Option 1: Rs. 6,000
Option 2: Rs. 7,200
Option 3: Rs. 6,800
Option 4: Rs. 7,000
Question : Per Capita income is equal to
Option 1:
Option 2: National Income + Population
Option 3: National Income - Population
Option 4: National Income x Population
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