It's 1:36 for every Australian airline. 1:36 is set by CASA and is mandatory for all Australian carriers. In most other countries the ratio is 1:50. As for QF72 there were either fewer passengers or more crew then what was reported but there would have been no more then 36 Passengers for each Cabin Crew member.
Hope this helps
Jason
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2012 FLIGHTS
26JAN QF501 BNE-SYD 73H VH-VXK // 26JAN QF2010 SYD-TMW DH3 VH-TQE // 30JAN FQ606 TMW-BNE J41 VH-TAH // 01AUG DJ1384 BNE-ADL 73H // 11AUG DJ1407 ADL-BNE E90]/
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