A is two years older than B who is twice as old as C. If the total of the ages of A, B and C be 27, the how old is B?  Select the correct option:
A) 7	B) 9	C) 8	D) 11	E) 10

Rationale: "explanation : let c ' s age be x years . then , b ' s age = 2 x years . a ' s age = ( 2 x + 2 ) years . ( 2 x + 2 ) + 2 x + x = 27 ⇒ 5 x = 25 ⇒ x = 5 . hence , b ' s age = 2 x = 10 years . answer : e"
Answer: E