The compound Y 2 PdGe 3 was earlier reported by us to be one of the very few ternary superconducting compounds (T c =3K) belonging to the same structure as that of MgB 2 . Here we report the results of electrical resistivity, magnetization and heat capacity measurements at low temperatures on the solid solution with a nominal starting composition, Y 2 Pd 1−x Pt x Ge 3 , to understand the influence of gradual replacement of Pd by Pt on T c . The superconducting properties of this solution is distinctly interesting in the sense that the T c varies monotonically with increasing x in sharp contrast to the non-monotonic variation for other isostructural solid solutions reported recently.