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Events E and F are such that P(not E or ...

Events E and F are such that `P(not E or not F) = 0. 25`, State whether E and F are mutually exclusive.

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The correct Answer is:
N/a
Here `P` (E -not or F-not) `=0.25`
`impliesP(E'uuF')=0.25`
`implies(EnnF)'=0.25`
`implies1-(EnnF)=0.25`
`impliesP(EnnF)=1-0.25=0.75`
`impliesP(EnnF)!=0`
`:,` Events E and F are not mutually exclusive.
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