Question

If the probability that an event occurs is 1/3, what is the probability that the event does NOT occur?

Answer 1

2/3.

Step-by-step explanation:

It either occurs or does not occur. There is no other result possible so the 2 probabilities add up to 1.

The answer is therefore 1 - 1/3 = 2/3.

Answer 2

2/3

Explanation:

The probability the event does not occur is 1 minus the probability the event does occur.

P = 1 − 1/3

P = 2/3