A spinner has nine equal sections labeled from one to nine. Determine the probability of the pointer landing on three.
When dealing with equally likely outcomes, as in this case, the probability of an event occurring can be written as a fraction where the numerator is the number of successful outcomes and the denominator is the number of possible outcomes.
As there are nine equal sections on our spinner, the number of possible outcomes is nine. There is only one three on the spinner, so there is one successful outcome.
The probability that the pointer lands on three is one out of nine or one-ninth.