SOLUTION: the average age of 4 brothers is 12 .if the average age of their mother included the average is increased by 5 years.calculate the age of their mother....

Question 935350: the average age of 4 brothers is 12 .if the average age of their mother included the average is increased by 5 years.calculate the age of their mother....
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
the average age of 4 brothers is 12 .if the average age of their mother included the average is increased by 5 years.calculate the age of their mother....
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average = (sum of numbers)/(# of numbers)
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Equations:
sum of brothers ages/4 = 12
sum of brothers ages = 48
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(sum of brothers + mother)/5 = 12+5
(48 + M) = 5*17
48 + M = 85
Mother's age = 37 yrs
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Cheers,
Stan H.
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