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Suppose the probability of an event occurring is P(A) , and the probability of the event not occurring is P(A’). If P(A)=s and P(A’) = t which of the following equations must be true ? A. t= 1-s
B. s= 1+t C. s= t-1 D. t= s+1!

Respuesta :

The correct answer is A) t = 1-s.

The probability of the complement of an event is the probability of the event subtracted from 1; in other words
P(A') = 1 - P(A)

Since P(A') = t and P(A) = s, 
t = 1-s

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