Average age of mother and father is 28 years. Average age of mother, father and their child is 20 years. What is the age of child?
Answer & explanation
Correct answer: option 1
Sum of age of father & mother = 2 × 28 = 56 years
Sum of age of mother , father & child = 3 × 20 = 60 years
Age of child = 60 - 56 = 4 years