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I'm learning about partition sets of the sample space.

I understand that events form a partition of Ω when:

1) events are mutually exclusive from each other

2) union of events adds up to Ω

My question is: how do can I determine if the events are mutually exclusive to each other, when the probability for any events are not given, AND were not explicitly determined.

for example:

A∪B∪C = D

How can I determined if the above example are mutually exclusive from each other, such that I could determine whether A∪B∪C forms a partition of D.

thanks

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# How to determined if events disjoin, when probaility of events is not given

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