The price of a dress was first discounted by a certain percent and later by 25 percent of the discounted price. If these two discounts are equivalent to a single discount of 40 percent of the original price, what was the first discount?
A. 10%
B. 15%
C. 20%
D. 30%
E. 65%
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সঠিক উত্তরঃ
C.
20%
Explanation:
এটি (A+B+ AB/100) সূত্র থেকে সহজে বের করা সম্ভব।
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