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Equal masses of two substances of densit...

Equal masses of two substances of densities `p_1` and `p_2` are mixed together. The density of mixture would be

A

`1/2(p_1 + p_2)`

B

`sqrt(p_1p_2)`

C

`(p_1 p_2)/(p_1 + p_2)`

D

`(2(p_1 p_2))/(p_1 + p_2)`

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