Sandy is younger than Molly by 8 years. If their ages are in the respective ratio of 7:9, how old is Molly? Pick
A) 18 B) 27 C) 36 D) 45 E) 54
S = M - 8   S / M = 7/9   9S = 7M   9(M-8) = 7M   M = 36   The answer is 36.
<result>C</result>
Sandy is younger than Molly by 8 years. If their ages are in the respective ratio of 7:9, how old is Molly?