Question

the sum of the probabilities of all the elements event of an expectation is​

Answer 1

Answer:

The sum of the probabilities of all outcomes must equal 1 . If two events have no outcomes in common, the probability that one or the other occurs is the sum of their individual probabilities. The probability that an event does not occur is 1 minus the probability that the event does occur.

Step-by-step explanation:

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Answer 2

Answer:

The sum of the probabilities of all outcomes must equal.

1. if two events have no outcomes in common the probability that one or the other or cause is the sum of their individual probabilities

2. the probability that an event does not occur in 1 minus the probability that the event does occur .