a trader marked the selling price of an article at 11 % above the cost price. at the time of selling, he allows certain discount and suffers a loss of 1 %. he allowed a discount of:
Choices.
A) 10 %	B) 10.5 %	C) 9.9 %	D) 12.5 %	E) none
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<gadget id="calculator">100 + 11</gadget>
<output>111</output>

<gadget id="calculator">11 / 111</gadget>
<output>11/111 = around 0.099099</output>

<gadget id="calculator">100 * (11/111)</gadget>
<output>1_100/111 = around 9.90991</output>

<result>C</result>
a trader marked the selling price of an article at 11 % above the cost price. at the time of selling, he allows certain discount and suffers a loss of 1 %. he allowed a discount of:
multiply(const_100, divide(add(multiply(add(const_2, const_3), const_2), 1), add(const_100, 11)))
"sol . let c . p . = rs . 100 . then , marked price = rs . 110 , s . p . = rs . 99 . ∴ discount % = [ 11 / 111 * 100 ] % = 9.9 % answer c"