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. $112$
• B. Rs. $129.60$
• C. Rs. $119.60$
• D. Rs. $115.20$

Answer 1

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 $=\left(\right(1-0.2\left)160\right)(1-0.1)$

$=(0.8\times 160)0.9$

$=115.2$