The average age of the mother and her six children is 12 year which is reduced by 5 years if the age of the mother is excluded. how old is the mother ? Choose the most appropriate option:
A) 40 year
B) 42 year
C) 48 year
D) 50 year
E) None of these
Solution   age of the mother= ( 12 × 7 - 7 × 6 ) year = 42 year. Answer 42 year
<result>B</result>
The average age of the mother and her six children is 12 year which is reduced by 5 years if the age of the mother is excluded. how old is the mother ?