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Question

Events E and F are such that P(not E or Not F) = 0.25 state whether E and F are mutually exclusive.
 



    Solution

    The correct option is

    Here P (Not E or not F) = 0.25 
    P(¯¯¯¯E¯¯¯¯F)=0.25¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯(EF)=0.251P(EF)=0.25P(EF)=10.25P(EF)=0.750
     thus E and F are not mutually exclusive events.
     

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