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Addition Theorem of Probability for 2 Events

If E represen...

Question

If E represents an event, P(E) + P(E’) = __

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Solution

P (E) + P(E’) = 1

P(sample space) = 1

S = E $\cup$ E’ where E and E’ are mutually exclusive events.

P(S) = P(E $\cup$ E’)= P(E) + P(E’) = 1

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