Problem: If yz:zx:xy=1:2:3, then yzx​:zxy​ is equal to
Answer Choices:
A. 3:2
B. 1:2
C. 1:4
D. 2:1
E. 4:1
Solution:
The ratio yzx​:zxy​=yzzx​:zxzz​=2:y1​=4:1 because it is given that yz:zx=1:2 and bence 2yz=zx so that yzzx​=2 and zxyz​=21​.