For the disproportionation of copper 2Cu+ $ \to $ Cu2+ + Cu, Eo is (Given Eo for Cu2+/Cu is 0.34 V and Eo for Cu2+/Cu+ is 0.15 V.)

Question

For the disproportionation of copper
2Cu⁺ $ \to $ Cu²⁺ + Cu, E^o is
(Given E^o for Cu²⁺/Cu is 0.34 V and
E^o for Cu²⁺/Cu⁺ is 0.15 V.)

0.49 V