Synopsis IAS

Answer

Solution

UPSC Prelims

Mathematics

Theme:

Percentage / प्रतिशत

Q47 2016, Percentage

Two numbers X and Y are respectively 20% and 28% less than a third number Z. By what percentage is the number Y less than the number X?

दो संख्याएं X और Y, किसी तीसरी संख्या Z से क्रमशः 20% तथा 28% कम हैं। संख्या Y संख्या X से कितने प्रतिशत कम है ?

Explanation

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Let third number Z be 100.

Therefore X will be 80 & Y will be 72.

Hence Y is 10% less than X. Hence, answer is (b)

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Q 47. 2016, Percentage

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