Dr Mumba says there is no political party which is able to get 50 percent plus 1 vote in an election at the moment.
He told ZNBC News in Lusaka that MMD is not in any alliance at the moment but will seek cooperation among parties ahead of the polls.
But the Forum for Democracy and Development -FDD- says it will go in the August election as an independent party.
FDD spokesperson Antonio Mwanza said political parties forming alliances have no confidence of winning the election.
Meanwhile PF Secretary General Davies Chama has disclosed that some opposition political parties have written to the PF for possible alliances ahead of the 2016 elections.
Mr Chama who declined to name the political parties said the PF is scrutinizing the letters.
He said the PF will work with progressive opposition parties that want to see Zambia develop.
And Mr. Chama says President Lungu is willing to work with everyone regardless of political affiliation.
Mr. Chama was speaking in a phone interview with ZNBC News from Kabompo.