The marks obtained by Polly and Sandy are in the ratio 5:6 and those obtained by Sandy and Willy are in the ratio of 3:2. The marks obtained by Polly and Willy are in the ratio of...?  Answers:
A) 3:2  B) 5:4  C) 7:6  D) 9:8  E) 11:10
Polly : Sandy = 5:6   Sandy : Willy = 3:2 = 6:4   Polly : Sandy : Willy = 5:6:4   Polly : Willy = 5:4   The answer is 5:4.
<result>B</result>
The marks obtained by Polly and Sandy are in the ratio 5:6 and those obtained by Sandy and Willy are in the ratio of 3:2. The marks obtained by Polly and Willy are in the ratio of...?