Probability

Probability of an event

Keywords:

PA=AΩ

|A| - number of ways an event can happen

|Ω| - total number of outcomes

PAB=PA+PB-PAB
P=0
Probability of an impossible event
PΩ=1
Probability of a sure event
PA¯=1-PA
PAB=PA|B·PB=PB|A·PA
PAB=PA·PB
In cas events A and B are independent