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anurag7mukharya
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Two methods to solve this one =>
Let CP be x => SP=x[1-10/100][1-20/100]=72x/100
discount amount = x=72x/100=28x/100
Discount percent = discount/CP *100 = 28%
Smash that C


Method 2 =>
Let CP=100
SP=100[1-10/100][1-20/100]=72
hence Discount = 28
Discount percent = 28%
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Discount = 1-0.9*0.8=1-0.72=0.28=28%
Answer choice C.

This is an example in the lower range that wants to trick people into forgetting about the joint effect of the two discounts and thus simply adding them to get 30%.
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Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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