Densities, viscosities, and refractive indices of the ternary system N, N-dimethylacetamide (1) + 2-methylbutan-2-ol (2) + ethyl acetate (3) at T = 298.15 K and the binary systems N, N-dimethylacetamide (1) + 2-methylbutan-2-ol (2), N, N-dimethylacetamide (1) + ethyl acetate (3), and 2-methylbutan-2-ol (2) + ethyl acetate (3) were measured at T = 298.15 K for the liquid region and at ambient pressure for the whole composition range. Excess molar volumes (V-E), deviations in the viscosity (Delta eta) from the mole fraction average, and deviations in the refractive index (Delta n(D)) from the volume fraction average for the mixtures were derived from the experimental data. The binary and ternary data of V-E, Delta eta, and Delta n(D) were correlated as a function of the mole fraction by using the Redlich-Kister and the Cibulka equations, respectively. The results are consistent with the self-association of alcohol and the polar and nonpolar characters of used ester and amide. McAlister's multibody and Kalidas-Laddha interaction model are used for correlating the kinematic viscosity of binary and ternary mixtures, respectively, with mole fraction. The experimental and the constituted binary and ternary systems are analyzed to discus the nature and strength of intermolecular interactions in these mixtures.