The average age of applicants for a new job is 30, with a standard deviation of 7. The hiring manager is only willing to accept applications whose age is within one standard deviation of the average age. What is the maximum number of different ages of the applicants? Pick:  A) 8  B) 14  C) 15  D) 18  E) 30

Rationale: "within one standard deviation of the average age means 31 + / - 7 23 - - 30 - - 37 number of dif . ages - 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 total = 15 c"
Answer: C