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If a/b=7/9,b/c=3/5, then the value of a:...

If `a/b=7/9,b/c=3/5`, then the value of `a:b:c` is

A

`7:9:15`

B

`7:9:15`

C

`21:35:45`

D

`7:3:15`

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The correct Answer is:
A
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