Question: event A has probability 0.4. Even B has probability 0.5. A third event C, has probabilty 0.6. Which of the following must be true? A,

event A has probability 0.4. Even B has probability 0.5. A third event C, has probabilty 0.6. Which of the following must be true?

A, B and C are disjoint

C must have some elements in common with at least one of a or b

The probability that c does not occur is 0.9

all of the above

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