The sum of the numbers is 550. If the first number be twice the second and third number be one-third of the first, then the second number is:  Choose the correct choice from the following answers.
A) 48	B) 150	C) 72	D) 84	E) 27

Rationale: "let the second number be x . then , first number = 2 x and third number = 2 x / 3 . 2 x + x + 2 x / 3 = 550 11 x / 3 = 550 x = 150 answer : b"
Answer: B