28. The sum of the ages of 5 children born at the intervals of 3 years each is 50 years. What is the age of the youngest child ?
A. 4 years B. 8 years
C. 10 years D. 12 years
Answer:
Let the ages of the children be x,(x+3),(x+6),(x+9) and (x+12) years.
Then, x+(x+3)+(x+6)+(x+9)+(x+12)=50
5x=20
x=4.
Age of the youngest child =4 years.
