conditional probability a level maths pure yr2

what is a sample space

set of all the possible outcomes

what is an event

it is set of one/ more possible outcomes

what are all the independecne laws

P ( a ) x P (b) = P ( a n b )

p ( a|b) = P ( b )

what are the mustually exclusive laws

p ( a n b ) = 0

P ( a u b ) = P ( a ) + p ( b )

what are the generall probability laws

p ( a|b) = P ( a n b ) / P ( b )

P ( a u b ) = P ( a ) + p ( b ) - P ( a n b )

what does mutually exclusive mean

does not overlapp