UPSC 2015 CDS II Math Paper

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Question : 30 of 100

Marks: +1, -0

If a:b=3:5 and b:c=7:8, then 2a:3b:7c is equal to

[2015 CDS-II]

42:105:320
15:21:35
6:15:40
30:21:350

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