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WE:Business Development (Energy and Utilities)
Re: The price of an item after five consecutive 10% discounts ar
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01 Jul 2018, 14:05
Explanation
Say the item costs $100. After the first 10% discount, the item costs $90. After the second, the item costs $81 (the new discount is only $9, or 10% of 90). After the third discount, the item costs $81 – $8.10 = $72.90.
What is the trend here? The cost goes down with each discount, yes, but the discount itself also gets smaller each time; it is only a $10 discount the very first time. The total of the five discounts, then, will be less than $50.
If the item costs $100 to start, then the value for Quantity B will be $50, or a total discount of $50. This is greater than the total discount described for Quantity A.
Finally, make sure to answer (A) for the higher price—don’t accidentally pick (B) for the “better deal”!