Question 115

The average age of mother and her six children is 12 years, which is reduced by 5 years if the age of the mother is excluded. The age of the mother ( in yrs) is:

Solution

Average age of mother and her six children = 12 years

=> Total age of 7 persons = $$12\times7=84$$ years

Let mother's age = $$x$$ years

According to ques,

=> $$\frac{(84-x)}{6}=7$$

=> $$84-x=7\times6=42$$

=> $$x=84-42=42$$ years

=> Ans - (C)

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