Theoretical correct score odds by NinthElement 2015/11/09 17:54
From the statistics chart below, we can determine the generic odds for each correct score in a soccer match (source http://fivethirtyeight.com/features/in-126-years-english-football-has-seen-13475-nil-nil-draws )

Home wins
1-0 = 1 in 10.2
2-0 = 1 in 12.3
2-1 = 1 in 11.2
3-0 = 1 in 21.0
3-1 = 1 in 20.0
3-2 = 1 in 35.7
4-0 = 1 in 43.5
4-1 = 1 in 40.0
4-2 = 1 in 71.5
Others = 1 in 99>

Away wins
0-1 = 1 in 15.9
0-2 = 1 in 29.5
1-2 = 1 in 17.9
0-3 = 1 in 71.5
1-3 = 1 in 43.5
2-3 = 1 in 55.6
Others = 1 in 143>

Draws
0-0 = 1 in 13.9
1-1 = 1 in 8.7
2-2 = 1 in 19.3
3-3 = 1 in 91
4-4 = 1 in 500
Others = 1 in 1000>

Exact total goals
0 goals = 1 in 13.9
1 goals = 1 in 6.3
2 goals = 1 in 4.4
3 goals = 1 in 4.9
4 goals = 1 in 6.5
5 goals = 1 in 11.3
6 goals = 1 in 21
7 or more goals = 1 in 28



There are of course other factors that can come into play for individual matches such as the relative skills of the two teams, and also the bias towards goals may be different in various leagues across the world, but these statistics from 126 years of English league matches should be a good indicator over the long term.