SOLUTION: three years ago the average age of a family of six members was 19 years. A baby having been born, the average age of the family is same today. what is the age of baby

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Question 1102551: three years ago the average age of a family of six members was 19 years. A baby having been born, the average age of the family is same today. what is the age of baby
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
average=total/n
19=total/6; total 3 years ago was 114.
Now n=7, and after 3 years, the total for the original 6 is 132.
The average is still 19
Therefore 132+x/7=19
133/7=19
Therefore the baby is 1 year old.