8th Class Mathematics Related to Competitive Exam Question Bank Arithmetic

  • question_answer
    A single discount equal to a discount series of 10% and 20% is

    A) 25%                      

    B) 30%

    C) 35%                      

    D) 28%

    Correct Answer: D

    Solution :

    \[100\times \frac{(100-10)}{100}\times \frac{(100-20)}{100}\] \[33\frac{1}{3}\] \[23\frac{1}{3}\] Single discount = 100  ? 72 = 28%


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