The Total Resistance of a Three-Branch Parallel Circuit Is $\Omega$ If R₁= and R₂=500

Multiple Choice

The total resistance of a three-branch parallel circuit is 76.92 $\Omega$
If R₁=100 and R₂=500 $\Omega$ , what is the value of R₃ ?

A) 140 $\Omega$
B) 1850 $\Omega$
C) 1000 $\Omega$
D) More information is needed to calculate R₃.