The average age of the mother and her six children is 12 years which is reduced by 5 years if the age of the mother is excluded. How old is mother?
(a) 40 years (b) 42 years (c) 48 years (d) 50 years
The average age of the mother and her six children is 12 years which is reduced by 5 years if the age of the mother is excluded. How old is mother?
(a) 40 years (b) 42 years (c) 48 years (d) 50 years