The average age of a group of n people is 14 years old. One more person aged 32 joins the group and the new average is 15 years old. What is the value of n?
Choose the correct answer.
A) 13  B) 14  C) 15  D) 16  E) 17

Rationale: "14 n + 32 = 15 ( n + 1 ) n = 17 the answer is e ."
Answer: E