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Equal masses of two substance of densiti...

Equal masses of two substance of densities `rho_(1) and rho_(2)` are mixed together. What is the density of the mixture?

A

`(d_(1) + d_(2))/2`

B

`(d_(1) + d_(2))/(d_(1)d_(2))`

C

`(d_(1)d_(2))/(d_(1) + d_(2))`

D

`(2d_(1)d_(2))/(d_(1) + d_(2))`

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