This forum is about wrong numbers in science, politics and the media. It respects good science and good English.
"If the Coalition can retain Herbert, the Turnbull government will have 77 seats in the 150-seat parliament, allowing the government to appoint a speaker while retaining an absolute majority."
Whereas if it remains 76-74, the government can appoint a speaker and have a 75-74 absolute majority.
I don't think you've thought that through.