The sum of the ages of the three children is 21 years and their age ratio is 1: 2: 4, so what is the age of the middle child?
1
3 years
2
5 years
3
6 years
4
9 years
The sum of the ages of the three children is 21 years and their age ratio is 1: 2: 4, so what is the age of the middle child?