Discussion
The list price of an article is Rs. 20. There is a discount of 5%. What is the selling price?
Answer: B
A 5% discount leaves 95% of the list price.
\[ \text{SP} = 20 \times (1 - 0.05) = 20 \times 0.95 = \text{Rs. } 19 \]
Equivalently, the discount is \( 0.05 \times 20 = \text{Rs. } 1 \), and \( 20 - 1 = 19 \). A discount always lowers the price, so any option above Rs. 20 can be discarded without calculating.
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