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The vapour pressure of A and B at 25 ^(@...

The vapour pressure of A and B at `25 ^(@)` C are 90 mm Hg and 15 mm Hg respectively. If A and B are mixed such that the mole fraction of A in the mixture is 0.6, then the mole fraction of B in the vapour phase is `x`x `10 ^(-1)` The value of x is ___________. (Nearest integer)

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