For the surname: BORHAM

Full Name	Suburb	State	Year
Alma BORHAM	Warabrook	Western Australia	2002
Cyril BORHAM		Western Australia	1996
Daphne BORHAM	at Moonby Nursing Home, formerly of Dungowan	Western Australia	2006
Edith BORHAM		Western Australia	2000
George BORHAM		Victoria	2005
Gertrude BORHAM	Adamstown	Western Australia	2006
Harold BORHAM	Tamworth and Duncanzzzzzs Creek	Western Australia	2003
Harry BORHAM	Thirroul, formerly of North Ryde	Western Australia	1997
Jean BORHAM	at Maitland Hospital, East Maitland, formerly of Hilldale	Western Australia	1975
John BORHAM	Dulwich Hill	Western Australia	1979
Judith BORHAM	Adamstown	Western Australia	1972
Leo BORHAM	North Lambton	Western Australia	2004
Lindsay BORHAM	West Wallsend	Western Australia	2001
Rosarie BORHAM	Dulwich Hill	Western Australia	1987
Thomas BORHAM	North Richmond	Western Australia	1984
Valmai BORHAM		Western Australia	2005
Frank BORHAM		Western Australia	2003

According to the Australian Bureau of Statistics (ABS) 2011 Census of Population and Housing, BORHAM is the 5,906th most common surname in Australia, with 1,843 (0.1%) people. It is more common than average (1,843/1,260,959 * 100 = 0.1%) and has a higher than average percentage of people aged 80+ (8.4%). Question: What is the probability that two people in