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Liquids A(p(A)^(@)=360" mm Hg") and B(p(...

Liquids A`(p_(A)^(@)=360" mm Hg")` and `B(p_(B)^(@)=320" mm Hg")` are mixed. If solution has vapour has vapour pressure 340 mm Hg, then number of mole fraction of B/mole solution will be

A

`(33)/(34)`

B

`(1)/(34)`

C

`(1)/(2)`

D

`(1)/(4)`

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