If 2 kg of metal of which 1/3 is zinc an...

If 2 kg of metal of which `1/3` is zinc and rest copper be mixed with 3 kg of metal of which is `1/4`zinc and rest copper, what is the ratio of zinc to copper in the mixture?

` 13 : 35`

` 12 : 30 `

` 15 : 40 `

` 17 : 43`

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