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Railways Sample Paper RRB (Group D) Sample Test Paper-12

  • question_answer
    Two successive discounts of 70% and 30% are equivalent to a single discount of

    A)  89%                

    B)  75%

    C)  79%                

    D)  100%

    Correct Answer: C

    Solution :

    [c] Single discount = \[x+y+\frac{xy}{100}\] \[=-\,70-\,30+\frac{(-\,70\times -\,30)}{100}\] \[=-\,100+21=-\,79%\] '\[-\]' Denotes discount. Hence, single discount equivalent to 79%


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