Question:The ratio of the ages of mother and son is `7 : 3`. If the sum of their ages is `60` years, what is the difference in their ages ? 

A `42` years 
B `24` years 
C `18` years 
D `4` years 

+ Answer
B 

+ Explanation
Mother's age `= (60 xx 7/(10))`

`= 42` years.

Son's age `=(60 - 42)`years

`= 18`years.

Difference of their ages `= (42 - 18)`years

`= 24` years.

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Md. Habib Ullah

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