On federal election day, voters are given two ballot papers: one for the House of Representatives and one for the Senate.
Evan Ekin-Smyth, from the Australian Electoral Commission, says a voter needs to put the number 1 next to their first choice candidate and then number every other box on the green House of Representatives ballot paper.
The counting of first preference votes takes place first and if no one candidate secures an absolute majority - 50 per cent plus 1 of the primary votes - the candidate with the least number of primary votes is eliminated from the count.
The second preference votes for the eliminated candidate are then redistributed among the remaining candidates, starting with the number two preference from the original ballot.
This process of elimination based on the preferences continues until one candidate secures an absolute majority.
Listen to the feature in Bangla in the audio player above.