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Question

A man purchases an electric heater whose printed price is Rs. $$160$$. If he received two successive discounts of $$20\%$$ and $$10\%$$, he paid ____________.


A
Rs. 112
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B
Rs. 129.60
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C
Rs. 119.60
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D
Rs. 115.20
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Solution

The correct option is D Rs. $$115.20$$
$$(20\%$$ discount on $$160) =x$$ (say)
And then $$(10\%$$ discount on $$ x)$$
The money he paid is $$=((1-0.2)160)(1-0.1)$$
$$=(0.8\times 160)0.9$$
$$=115.2$$

Maths

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