when i was married 10 years ago,my wife was the 6th member in the family.today,my father died,and a baby was born to me.the average age in my family today is what it was when i was married.how old was my father when he died?
1.50yrs 2.60yrs 3.70yrs 4.indeterminate

• 2. 60
  10 years ago the family members there were 6 members with age= I+Father+Wife+3 others
  Now 6 members with age= (I+10)+(Wife +10)+ (3 others+3*10) + (baby=0).
  I+Father+Wife+3 others=(I+10)+(Wife +10)+ (3 others+3*10) + (baby=0)
  Father =50+0 = 50 = Father's age 10 year ago
  So now father's age=50 +10=60.
• 11 years agoHelpfull: Yes(10) No(1)
• indeterminate
  
• 12 years agoHelpfull: Yes(0) No(4)