Two liquids of densities  ${\rho }_1\mathrm{\&}{\rho }_2\text{ having volumes }{V}_1\mathrm{\&}{V}_2$ are mixed, then the density of  mixture is

$\text{ If the liquids of densities }{\rho }_1\text{ and }{\rho }_2\text{ having volumes }{\mathrm{v}}_1\text{ and }{\mathrm{v}}_2\text{ re mixed then the }$density of the mixture is 

$\because m_1={\rho }_1{\mathrm{v}}_1{m}_2={\rho }_2{\mathrm{v}}_2$