3 years ago the average age of a family of 5 members was 17 years. With the birth of a new baby, the average age of six members remains the same even today. Find the age of the new baby.  Choose one:
A) 1 year
B) 2 years
C) 1 1⁄2 years
D) cannot be determined
E) None of the above
Sum of present ages of the six members   = (17 × 6) years = 102 years.   Sum of present ages of the 5 members (excluding baby)   = 5 × (17 + 3) years = 100 years.   ∴ Age of the baby = 102 – 100 = 2 years   Answer 2 years
<result>B</result>
3 years ago the average age of a family of 5 members was 17 years. With the birth of a new baby, the average age of six members remains the same even today. Find the age of the new baby.