Practicing Success
A shopkeeper is ready to sell his goods at one of the following four schemes. Which scheme is the most beneficial for the customer? |
10%, 10% 15%, 5% 12%, 8% 16%, 4% |
16%, 4% |
The scheme beneficial for the customer depends on agg. discount (a) 10% , 10% MP ×\(\frac{9}{10}\) × \(\frac{9}{10}\) = MP × \(\frac{81}{100}\) ⇒ Discount 19% (b) 15%, 5% MP × \(\frac{17}{20}\) × \(\frac{19}{20}\) = MP × \(\frac{323}{400}\) ⇒ Discount 19.25% (c) 12%, 8% MP × \(\frac{22}{25}\) × \(\frac{23}{25}\) = MP × \(\frac{506}{625}\) ⇒ Discount 19.04% (d) 16%, 4% MP × \(\frac{21}{25}\) × MP\(\frac{24}{25}\) = MP × \(\frac{504}{625}\) ⇒ Discount 19.36% ∴ scheme (d) yields best discount Ans. d) 16%, 4%
*Alternate way: The maximum discount between two percentages is always beneficial for the customer. i.e. difference b/w 16 & 4 is 12 and that is maximum as compare to others. Hence, (d) is answer. |