5th Class Mathematics Arithmetic Question Bank Arithmetic

  • question_answer Find the percentage of pure gold in 22-carat gold. If 22-carat gold is 100% pure gold.

    A) \[1\frac{1}{2}%\]%

    B) \[91\frac{2}{3}%\]%

    C) \[6\frac{1}{3}%\]%

    D) \[7\frac{1}{2}%\]%

    Correct Answer: B

    Solution :

    In 22- carat gold, pure gold is 22 parts out of 24 parts. \[\therefore \] Percentage of pure gold in it \[=\left( \frac{22}{24}\times 100 \right)%\] \[=\frac{275}{3}%=91\frac{2}{3}%\]

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