First step is to find out the total number of outcomes i.e. sample space available to us. For example, if we are throwing a dice, there would be 6 possible outcomes and throwing same dice more than one time will multiply 'n' times to 6.
Next we will calculate the possibility of a particular event to occur. In our example indicated probability for digits i.e.1, 2, 3, 4, 5 and 6 is 1 /6 for each and every digit to occur in one throw. Similarly, probability of occurrence of digits increase in multiple throws.
This probability is obtained by dividing the number of occurrences for the required digit by total number of outcomes. In our example we have 1 as total number of occurrence for any digit when a dice is thrown and total number of outcomes as 6. So, we get indicated probability as: 1 /6. Thus we see that probability was been indicated by possibility of occurrence of digits. We did not perform any calculations to find out the actual probability.