Sony is one-fifth the age of her mother 15 years ago and Sony s brother is three-fifth the age of his mother 10 years ago. If the sum of Sony and her brother s ages is 31 then how old is Sony's mother ?

Sony is one-fifth the age of her mother 15 years ago and Sony s brothe

1.	Sony is one-fifth the age of her mother 15 years ago and Sony s brother is three-fifth the age of his mother 10 years ago. If the sum of Sony and her brother s ages is 31 then how old is Sony's mother ?
A.	40
B.	50
C.	60
D.	70
Answer» C. 60

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Sony is one-fifth the age of her mother 15 years ago and Sony s brother is three-fifth the age of his mother 10 years ago. If the sum of Sony and her brother s ages is 31 then how old is Sony's mother ?

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