The cash difference between the selling prices of an book at a profit of 12% and 20% is $3. The ratio of the two selling prices is:  Choose the correct answer
A) 55:23 B) 52:33 C) 52:53 D) 45:53 E) 14:15
Let C.P. of the book be $x.   Then, required ratio = 112% of x / 120% of x   = 112/120 = 14/15 = 14:15   14:15
<result>E</result>
The cash difference between the selling prices of an book at a profit of 12% and 20% is $3. The ratio of the two selling prices is: