Question

The sum of the probabilities of all events of a trial is​

Answer 1

Answer:

The sum of the probabilities of all possibilities must equal 1 . Some outcome must occur on every trial, and the sum of all probabilities is 100%, or in this case, 1 . This can be written as P(S)=1 P ( S ) = 1 , where S represents the entire sample space.

Answer 2

Answer:

Sum of the probabilities of all events of a trial  = 1

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