The electrode potentials for <br> $Cu^{2+}_{(aq)} + e^- \to Cu^+_{(aq)}$ <br> and $Cu^+ _{(aq)} + e^- \to Cu_{(s)}$ <br> are + 0.15 V and + 0.50 V respectively. The value of $E^o _{Cu^{2+}/Cu}$ will be :

Question

( A ) 0.650 V
( B ) 0.150 V
( C ) 0.325 V
( D ) 0.500 V