Q. The present average age of a couple and their son is 35 years. Fifteen years from now, the age of the mother will be equal to the sum of present ages of the father and the son. Find the present age of mother?
A
41 years
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B
43 years
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C
45 years
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D
47 years
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Solution
The correct option is C 45 years Explanation: (f+m+s)/3=35 ⇒f+m+s=105−−−(1) m+15=f+s Substituting f+s as m+15 in (1), we get 2m+15=105 2m=90⇒m=45years.