Does mixing brown noise and white noise create pink noise?
Does mixing brown noise and white noise create pink noise?


No. 

Pink noise has a spectrum of that falls with 3dB/octave (or 10dB/decade). The spectrum of the sum of white and brown noise will be "brown" at low frequencies and "white" at high frequencies. The spectrum will have two slopes: below the transition frequency it will be -6dB/octave and above it, it will just be flat.

Somewhere in the transition region will be a frequency range that could be considered approximately  "pink" but it's not really a constant slope.

That transition frequency is simply a function of the mix ratio (and the initial energies) of the two noise signals.

If you define "mixing" as a multiplication and not a summation, the result will just be white.