When the certification of the tally sheets is complete, the officer of elections shall publicly announce the results and shall, on demand of any candidate or watcher present, furnish such person a certified copy of the results. The certificate shall include the names of all candidates appearing on the ballot, the number of votes received by each and the number of votes for and against each question, including separately the total number of votes cast for each by voting machine and by paper ballot. The certificate shall be signed by the officer of elections and the judges and may be used as competent evidence in case of a contest regardless of what tribunal is hearing the contest.