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Signals and Systems - Engineering

Q1:

which of the following is not correct?

A
P(A) = P(A) - 1

B 0 ≤ P ≤ 1

C If A and B are mitual exclusive then P(A + B) = P(A) + P(B)

D
P(A) = 1 - P(A)

ANS:A -

P(A) = P(A) - 1

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