The probability that an event will happen is 3/6. What is the probability the event won't happen

3/6

Step-by-step explanation:

If the probability that it will happen is 3/6 or 1/2 the probability is the opposite. which is also 3/6 or 1/2.

Answer: 3/6

Step-by-step explanation: the probability of success plus probability of failure equals 1. That is, if 'P' and 'Q' represent the probabilities of an event happening (success) or not (failure) respectively. Thus, P+Q=1.

Since P is given as 3/6, we substitute it into the equation P+Q=1. Therefore, Q=1-P; Q=1-3/6; Q=3/6.