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प्रश्न
Given P(A) = `3/5` and P(B) = `1/5`. Find P(A or B), if A and B are mutually exclusive events.
योग
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उत्तर
A and B are mutually exclusive events, then
P(A ∩ B) = 0
P(A) = `3/5`, P(B) = `1/5`
P(A or B) = P(A ∪ B) = P(A) + P(B) – P(A ∩ B)
∴ P(A ∪ B) = `3/5 + 1/5 - 0`
= `4/5`
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