SOLUTION: You are given a probability that an event will happen P(E) = 0.7. What is the probability that the event won’t happen?

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Question 714856: You are given a probability that an event will
happen P(E) = 0.7.
What is the probability that the event
won’t happen?

Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
1-P%28E%29=1-0.7=0.3
The two probabilities add up to 1, because the event will happen or will not happen, but there is no other option, so we are sure that one of those two situations will be true.