Two solutions of non-volatile and non-electrolyte solute `A` and `B` are prepared separately. The molar mass ratio `(M_(A))/(M_(B))=1/3`. Both are prepared as `5%` by weight solution in water. Then what is the ratio of freezing point depresions, `((DeltaT_(f))_(A))/((DeltaT_(f))_(B))` of the solutions?
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