Given the task definition and input, reply with output. Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.

Problem: 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 :
Options: a. 48, b. 150, c. 72, d. 84, e. 27
b