A) 15 : 12 : 8
B) 15 : 10 : 6
C) 18 : 10 : 5
D) 12 : 8 : 9
Correct Answer: B
Solution :
[b] Let \[\frac{1}{x}=2k,\,\,\frac{1}{y}=3k\] and \[\frac{1}{z}=5k\] Then, \[x=\frac{1}{2k},\]\[y=\frac{1}{3k}\]and \[z=\frac{1}{5k}\] \[\therefore \] \[x:y:z=15:10:6\] |
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