If the price of a certain computer increased 30 percent from d dollars to 351 dollars, then 2d = Choose the correct choice:
A) 540
B) 570
C) 619
D) 649
E) 700

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