The sum of ages of 4 children born 4 years different each is 48 yrs. What is the age of the Elder child?	Pick one:  A) 8  B) 9  C) 16  D) 17  E) 18

Rationale: "let the ages of children be x , ( x + 4 ) , ( x + 8 ) , ( x + 12 ) years . then , x + ( x + 4 ) + ( x + 8 ) + ( x + 12 ) = 48 4 x = 24 x = 6 x + 12 = 6 + 12 = 18 answer : e"
Answer: E