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Q.

Find the single discount equivalent to two successive discounts of  Question Image :


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a

Question Image

b

Question Image

c

Question Image

d

Question Image 

answer is A.

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Detailed Solution

Concept: In this case, we will first assume that any number will discover the two successive discounts. As a result, we'll suppose that number is 100. Using the concept to find two successive discounts given. So, we will take the number to 100. Then by using the formula Question Image where x is the number we assumed,
Using the above formula
Question ImageNow, again we will find a 10% discount on 80. So, we will get as
Question ImageSo, now we will see how much percent of 100 is equal to 72. So, here the formula
used will be where we have to find a discount%. So, we will get as
Question Image => Question ImageQuestion ImageHence, the correct answer is option (1).
 
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