three and a half years ago the average age of family of 3 members was 12 and half years then.including a baby the present average age is still same today .how old is baby now?

• 12.5 * 3 = 37.5 (three and half years ago)
  
  12.5 + 3.5 = 16 * 3 = 48 (present average age)
  
  now its 4 members including the baby
  
  12.5 * 4 = 50
  
  50 - 48 = 2 years(baby age)
• 10 years agoHelpfull: Yes(0) No(0)