For the surname: BERRETT

Full Name	Suburb	State	Year
Donald BERRETT		South Australia	2006
Eric BERRETT	at Robinvale and District Hospital	Victoria	2004
Helen BERRETT	Hazelbrook	Western Australia	1976
Don BERRETT		South Australia	2006
Dora BERRETT		Victoria	2008
Harold BERRETT	Adelaide	South Australia	0
Margaret BERRETT	Adelaide		0
Betty BERRETT	Adelaide	South Australia	0
Todd BERRETT	Sydney	New South Wales	0
Todd BERRETT	Sydney	New South Wales	0
Todd BERRETT	Sydney	New South Wales	0
Todd BERRETT	Sydney	New South Wales	0
Todd BERRETT	Sydney	New South Wales	0
Todd BERRETT	Sydney	New South Wales	0
Todd BERRETT	Sydney	New South Wales	0
Todd BERRETT	Sydney	New South Wales	0
Todd BERRETT	Sydney	New South Wales	0
Todd BERRETT	Sydney	New South Wales	0
Todd BERRETT	Sydney	New South Wales	0
Todd BERRETT	Sydney	New South Wales	0
Todd BERRETT	Sydney	New South Wales	0
Todd BERRETT	Sydney	New South Wales	0
Peter BERRETT			0
Peter BERRETT			0

According to the country statistics, there are 7262 people with surname BERRETT in Australia. This is on a total of 18,919 people. Question: What is the probability to have a surname BERRETT given the following birth data? Answer: Of all the births in Australia from 1890 to 1990, the following is the number of births per year (in thousands) for each birth year and each sex: The following graph displays the probability for