Calculating the Probability of an Event Occurring

In simple probability, the probability of an event occurring is calculated by dividing the number of favorable outcomes by the total number of possible outcomes.

The formula for probability is:

[ P(E) = \frac{n(E)}{n(S)} ]

Where ( P(E) ) is the probability of event E, ( n(E) ) is the number of favorable outcomes, and ( n(S) ) is the total number of possible outcomes.

For example, if we roll a standard six-sided dice, the probability of rolling a 4 would be ( \frac{1}{6} ), since there is one favorable outcome (rolling a 4) out of six possible outcomes.

Understanding this concept will help Grade 9 students in South Africa master the basics of probability.