Question

If A and A' are complementary event of each other then which of the following is correct?
(a) P(A/A')=1
(b) P(A'/A)=1
(c) P(A/A')=0
(d) P(A)P(A')=1​

Answer 1

Since P(A)+P(B)=1

∴A∩B=0.

Thus, event A and B are mutually exclusive, exhaustive and complementary events.

Hence, option A is correct.