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Banking Sample Paper IBPS Clerk (Main) Sample Paper Test-1

  • question_answer
    The population of a village is 74088. During the last three years, the population increased at the rate of 5% per year. The population three years ago was

    A)  64000

    B)    62162

    C)    50172

    D)    67200

    E)    70145

    Correct Answer: A

    Solution :

    Population three years ago \[=\frac{P}{{{\left( 1+\frac{R}{100} \right)}^{3}}}=\frac{74088}{{{\left( 1+\frac{5}{100} \right)}^{3}}}\] \[=\frac{74088\times 20\times 20\times 20}{21\times 21\times 21}=8\times 8\times 1000\] = 64000


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