| The difference between a discount of 40% on Rs. 500 and two successive discounts of 36% and 4% on the same amount is [SSC (CGL) 2011] |
A) Rs. 0
B) Rs. 2
C) Rs. 1.93
D) Rs. 7.20
Correct Answer: D
Solution :
| Single equivalent discount for 36% and 4% |
| \[=\left( x+y-\frac{xy}{100} \right)%=\left( 36+4-\frac{36\times 4}{100} \right)\]%\[=(40-1.44)%=38.56\]% |
| \[\therefore \]Required difference \[=(40-38.56)\]%=38.56% |
| = 1.44% of 500 |
| \[=\frac{500\times 1.44}{100}=\text{Rs}\text{.}\,\,\text{7}\text{.20}\] |
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