Question

If a and b be two events with p(aub)=0.6,p(a)=0.5,p(b)=0.3 then find p(a complement-b)

Answer 1

Answer:

0.4

Step-by-step explanation:

Writing x' for complement of x...

a' - b

= a' ∩ b'        ( definition of set difference )

= ( a ∪ b )'       ( De Morgan's Laws )

So

P( a' - b ) = P( ( a ∪ b )' ) = 1 - P( a ∪ b ) = 1 - 0.6 = 0.4