A) 40 yr
B) 45 yr
C) 50 yr
D) 60 yr
Correct Answer: D
Solution :
Let the daughter's age be x yr. Then, father's age = (3x) yr. Mother's age \[=(3x-9)\,yr.\] Son's age \[=(x+7)\,\,yr\] So, \[x+7=\frac{3x-9}{3}\Leftrightarrow \,\,2x+14=13x-9\Leftrightarrow x=23\] \[\therefore \] Mother's age \[=(3x-9)=(69-9)\,yr=60\,yr.\]You need to login to perform this action.
You will be redirected in
3 sec