Example:
By using a die, what is the probability of rolling a three on the first try?
Solution:
First, determine the number of possible outcomes. In that case, there are 6 possible outcomes. From the stated problem, the roll is a success only if a 3 is rolled. There is only 1 success outcome and 5 failures. Thus,
Probability = 1/(1+5)
= 1/6
In calculating probability, the probability of a series of independent events equals the product of probability of the individual events.