Prob(a or b or c or z) NOT mutually exclusive

[osaad]

i need a general form to solve Prob(a or b or c ... or z) that r not mutually exclusive.

i managed to derive it for 2,3 and 4 variables but i can't seem to get a general form out of it, its recursive.


any1 know a way?

 

[awkward]

i need a general form to solve Prob(a or b or c ... or z) that r not mutually exclusive.

i managed to derive it for 2,3 and 4 variables but i can't seem to get a general form out of it, its recursive.


any1 know a way?

It's called the Principle of Inclusion / Exclusion.

http://en.wikipedia.org/wiki/Principle_of_inclusion-exclusion#In_probability

 

[osaad]

It's called the Principle of Inclusion / Exclusion.

http://en.wikipedia.org/wiki/Principle_of_inclusion-exclusion#In_probability

thanks that was exactly what i was looking for