The average age of four brothers is 12 years. If the age of their mother is also included, the average is increased by 5 years. The age of the mother (in years) is :

The average age of four brothers is 12 years. If the age of their moth

1.	The average age of four brothers is 12 years. If the age of their mother is also included, the average is increased by 5 years. The age of the mother (in years) is :
A.	7 years
B.	3 years
C.	8 years
D.	3 years
Answer» B. 3 years

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The average age of four brothers is 12 years. If the age of their mother is also included, the average is increased by 5 years. The age of the mother (in years) is :

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