Average age of 6 Childrenâ€™s of a family is 8 years. The average of Childrenâ€™s and their parentâ€™s age is 22 years. If father is 8 year older than the mother then find the age of their mother.
Let, Motherâ€™s age is = X
Then fatherâ€™s age = X+8
Sum of age of 6 childrenâ€™s = 48
Sum of childrenâ€™s and their parents age = 48+X+X+8= 56+2X
Average of childrenâ€™s and their parents age = 56+2X /8
As given, 22= 56+2X/8
2X = 120, X= 60 years