To find the probability of the complement of an event, we can use a simple formula. The complement of an event E, denoted as E’, represents all outcomes that are not contained in event E.
The formula to compute the probability of the complement is:
P(E’) = 1 – P(E)
Given that the probability of event E, P(E), is 0.31, we can substitute this value into the formula:
P(E’) = 1 – 0.31
Calculating this gives us:
P(E’) = 0.69
Therefore, the probability of the complement of event E is 0.69. This means that there is a 69% chance that the event will not occur.