One year ago the ratio of Yamini’s and Gamini’s ages was 6 : 7 respectively. Four years hence this ratio would become 7 : 8. How old is Gamini?  Choose the correct answer.
A) 35 years  B) 30 years  C) 31 years  D) Cannot be determined  E) None of these
Y : G = 6 : 7; One year before   Y : G = 7 : 8; After 4 years   Now, 1 → 5   ∴ 7 → 35   Therefore, the age of Gamini now is   35 + 1= 
<gadget id="calculator">  35 + 1</gadget>
<output>36</output>
36 years   Answer None of these
<result>E</result>
One year ago the ratio of Yamini’s and Gamini’s ages was 6 : 7 respectively. Four years hence this ratio would become 7 : 8. How old is Gamini?