That would be a fail because selective schools don't have a catchment area. My wife teaches at a selective high school in Sydney's north, they have lots of students from the southside, some as far away as Minto.
http://www.goodschools.com.au/choosing-a-school/school-sectors/selective-and-comprehensive-schools
Ok - I didn't know that. nevertheless, proximity to the school... people with children would obviously want to live closer to school.