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A scientific calculator is available at Universal shop in Hazratganj at 20% discount and the same is available at only 15% discount at Bhootnath market. Pooja has just sufficient amount of Rs 800 to purchase it at Universal shop, Hazratganj. What is the amount that Pooja has less than the required amount to purchase it at Bhootnath?

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Rs. 70

Rs. 50

Rs.100

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answer is B.

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Detailed Solution

The value of the calculator before discount at Universal shop be x.
x-20% of x=800

\Rightarrow x - \frac{20}{100} x = 800

\Rightarrow \frac{4 x}{5} = 800

\Rightarrow x = 1000

The discount on calculator at Bhootnath market is given by 15% of 1000 = 150
Selling price of calculator at Bhootnath market as: 1000−150=850
amount that Pooja paid less to buy that calculator is given by: 850−800=50

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