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?  Choices
A) 50yrs
B) 60yrs
C) 70yrs
D) 80yrs
E) indeterminate
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= 
<gadget id="calculator">50+0</gadget>
<output>50</output>
50= Father's age 10 year ago   So now father's age=50 +10= 
<gadget id="calculator">50 +10</gadget>
<output>60</output>
60.   ANSWER:60yrs
<result>B</result>
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?