Question

The average age of the mother and her 6 children is 12years which is reduced by 5 year

Answer 1

5 years back
Average age of 7 people = 12 years
Sum of ages = 12 *7 = 84 years
Since, it is 5 years reduced
Therefore, total age reduced = 5*7 = 35 years

So,
New sum of ages = 84 + 35 = 119 years
So, total number of people = 7
So,
New average = 119/7 = 17 years

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