If the price of a certain computer increased 30 percent from d dollars to 377 dollars, then 2d = Select the correct option:
A) 540  B) 570  C) 619  D) 649  E) 580

Rationale: "before price increase price = d after 30 % price increase price = d + ( 30 / 100 ) * d = 1.3 d = 377 ( given ) i . e . d = 377 / 1.3 = $ 290 i . e . 2 d = 2 * 290 = 580 answer : option e"
Answer: E