If the price of a certain computer increased 30 percent from d dollars to 338 dollars, then 2d = Choose the correct choice from the following options
A) 540  B) 520  C) 619  D) 649  E) 700

Rationale: "before price increase price = d after 30 % price increase price = d + ( 30 / 100 ) * d = 1.3 d = 338 ( given ) i . e . d = 338 / 1.3 = $ 260 i . e . 2 d = 2 * 260 = 520 answer : option b"
Answer: B