Question

what does this mean P(B) and above the B there is a flat bar? How do i find this probability

Answer 1

I'm going to denote the one with the flat bar as P( B' )


It turns out that

P( B ) + P( B' ) = 1


So

P( B' ) = 1 - P( B )

Answer 2

ok thanks

Answer 3

yw