By selling 12 toffees for a dollar, a man loses 20%. How many for a dollar should be sell to get a gain of 20%?
Choices.
A) 8	B) 5	C) 9	D) 4	E) 3
A   8   Let S.P. of 12 toffees be $x.   Then, 80:1 = 120:x or x = 120/180 = 3/2   For $3/2, toffees sold = 12.   For Re. 1, toffees sold = 12 * 2/3= 
<gadget id="calculator">12 * 2/3</gadget>
<output>8</output>
8
<result>A</result>
By selling 12 toffees for a dollar, a man loses 20%. How many for a dollar should be sell to get a gain of 20%?