Question
Question: Let A and B are two events and P(A¢) = 0.3; P(2) = 0.4, P(A Ē B¢) = 0.5 then P(A Č B¢) is...
Let A and B are two events and P(A¢) = 0.3; P(2) = 0.4,
P(A Ē B¢) = 0.5 then P(A Č B¢) is
A
0.5
B
0.8
C
1
D
0.1
Answer
0.8
Explanation
Solution
P(1) = 0.7 P(2) = 0.4
P(A Ē B¢) = P(1) – P(A Ē B Ž 0.7 – P(A Ē B) = 0.5
P(A Ē B) = 0.2
n(A Č B¢) = 8
P (A Č B¢) = 8/10 = 0.8