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SSC Sample Paper Mock Test-19 SSC CGL Tear-II Paper-1

  • question_answer
    A district has 6400 inhabitants. If the population increases at the rate of \[2\frac{1}{2}%\]per annum, the  number of inhabitants at the end of 3 yr will be

    A) 70000

    B)  69200

    C)          68921

    D)  68911  

    Correct Answer: C

    Solution :

    \[P={{P}_{0}}{{\left( 1+\frac{R}{100} \right)}^{T}}=64000{{\left( 1+\frac{5}{200} \right)}^{3}}\] \[=64000{{\left( \frac{41}{40} \right)}^{3}}\] \[=\frac{64000\times 41\times 41\times 41}{40\times 40\times 40}\] \[=68921\]


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