In everyday life, you often face situations that may yield a range of possible outcomes, and you are not certain which outcome will result. By assigning a probability to a possible outcome, you attempt to quantify how likely it is that the possible outcome will occur. A probability is a number between 0 and 1 that reflects the likelihood of some outcome.
According to the relative frequency approach to assigning probability, the probability that an outcome occurs is interpreted as:

a) A proportion of the time that the outcome occurs when the experiment or situation is presented repeatedly under identical conditions.
b) A personal measure of the strength of belief that an outcome will occur.
c) A value calculated by dividing the number of ways the outcome of interest can occur by the total number of possible outcomes, assuming each outcome is equally likely.

Suppose you assign a probability using the relative frequency approach. Then you should interpret that probability using the approach.