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SSC Quantitative Aptitude Simple Interest Question Bank Simple and Compound Interest (II)

  • question_answer
    The population of a town, 2 yr ago was 45000. It increased by 12% in the first year and decreased by 15% in the second year. What was the population of the town at the end of 2 yr?

    A) 57960

    B) 42840

    C) 44820

    D) 50400

    Correct Answer: B

    Solution :

    [b] \[\because \]P = 45000, \[{{r}_{1}}=12%,\] \[{{r}_{2}}=-15%\] \[\therefore \]      \[A=P\left( 1+\frac{{{r}_{1}}}{100} \right)\left( 1+\frac{{{r}_{2}}}{100} \right)\] \[=45000\left( 1+\frac{12}{100} \right)\,\left( 1-\frac{15}{100} \right)=42840\]


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