If A and B are two events such that P (A) = 3/4, P (B) = 1/2 and P (A n B) = 3/4,
find P (not A and not B).
Pick.
A) A)1	B) B)1/2	C) C)1/3	D) D)1/4	E) E)1/5
P(not A and not B) = 1 - (P(A) + P(B) - P(AB))   which you might find somewhere in your text.   Substituting in our probabilities we get:   P(not A and not B) = 1 - (3/4 + 1/2 - 3/4)   P(not A and not B) = 1 - (1/2)   P(not A and not B) = 1/2.   1/2
<result>B</result>
If A and B are two events such that P (A) = 3/4, P (B) = 1/2 and P (A n B) = 3/4,
find P (not A and not B).