<PRE><B>Question 252669</B>
Let the age of Janet be x.
Given,George is 3 years older than his sister Janet.
So the age of George = x+3
After seven years, their ages will be x+7 and (x+3)+7 
Given, (x+7)/(x+10) = 6/7
             7(x+7) = 6(x+10)
             7x+49  = 6x+60
              7x-6x = 60-49
                  x = 11
Therefore, the age of Janet is 11 years
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