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Question
The purchase price of 12 pencils equals to the sales price of 8 pencils. What is the rate of profit in %?
76
72
40
100
50
ANSWER : 5
Descrption
<p>Let, </p> <p>Purchase price of 12 pencil = Tk. x</p> <p>Purchase price of 1 pencil = x /12</p> <p>Salse price of 8 pencil = Tk. x</p> <p>Salse price of 1 pencil = x/8</p> <p>Profit = x/8 - x/12 = ( 3x - 2x) /24 = x/24 </p> <p>In the x/12 profit is Tk.x/24</p> <p>In the 1 profit is Tk ( x × 12) /( 24 ×x) </p> <p>In the 100 profit is Tk = ( x × 12 ×100)/ ( 24 × x) = 50</p>
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