A semiconductor has an electron concentration of $0.45 \times 10^{22} \; /m^3$ and a hole concentration of $5 \times 10^{20} \;/ m^3$. Find its conductivity.

Question

Note: $\mu_c = 0.135 \; m^2/V-S, \;\mu_h = 0.048\; m^2/V-S.$