A solution consisting of isobutyl bromide and isobutyl choloride isfound to have a refractive index of 1.3931 at 20oC. The refractive indices at 20o C of isobutyl bromideand isobutyl choloride are 1.4368 and 1.3785 respectively.Determine the molar composition (in percent) of the mixture byassuming a linear relationship between the refractive index and themolar composition of the mixture.