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Given P(A)=3/5 and P(B)=1/5 . Find P(A "...

Given `P(A)=3/5` and `P(B)=1/5` . Find `P(A "or" B)`, if A and B are mutually exclusive events.

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The correct Answer is:
N/a
Here `P(A)=3/5, P(B)=1/5`
Given that A and B are mutually exclusive events.
`:. AnnB=phi`
`impliesP(AnnB)=0`
Now, `P(A "or"B)=P(AuuB)`
`=P(A)+P(B)-P(AnnB)`
`=3/5+1/5-0=4/5`
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