Answer Posted / muhammad aamir siddiq

Ok I have seen many Answers but none of them seem correct.

Heres the real way to solve this data sufficiency problem:

We don't need to consider the cost price at all. It is already clued in the question.

1st Part
When we earn 25% profit by offering 25% discount it means:

Selling price before 25% discount=$100
Selling price after 25% discount= $75
So we come to know( as its mentioned in the question) that when we sell certain item with 25% discount or $75 we will get 25% profit.

2nd Part
Now if we give 10% discount then selling price after 10% discount = $90
How much profit will we get when we'll sell an item for $90?
So we need to find the profit by this basic cross multiplication method:

75---25
90---x

75x= 25*90/75= 30

So our profit will be 30%

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