If the price of a certain computer increased 30 percent from c dollars to 351 dollars, then 2c = Pick one
A) 540  B) 570  C) 619  D) 649  E) 700

Rationale: "before price increase price = c after 30 % price increase price = c + ( 30 / 100 ) * c = 1.3 c = 351 ( given ) i . e . c = 351 / 1.3 = $ 270 i . e . 2 c = 2 * 270 = 540 answer : option a"
Answer: A