1.

If two liquids of same masses but densities \[{{\rho }_{1}}\] and \[{{\rho }_{2}}\] respectively are mixed, then density of mixture is given by

A.             \[\rho =\frac{{{\rho }_{1}}+{{\rho }_{2}}}{2}\]                    
B.             \[\rho =\frac{{{\rho }_{1}}+{{\rho }_{2}}}{2{{\rho }_{1}}{{\rho }_{2}}}\]                      
C.             \[\rho =\frac{2{{\rho }_{1}}{{\rho }_{2}}}{{{\rho }_{1}}+{{\rho }_{2}}}\]                      
D.             \[\rho =\frac{{{\rho }_{1}}{{\rho }_{2}}}{{{\rho }_{1}}+{{\rho }_{2}}}\]
Answer» D.             \[\rho =\frac{{{\rho }_{1}}{{\rho }_{2}}}{{{\rho }_{1}}+{{\rho }_{2}}}\]


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