Using this table, find the probability of the concentration of sulphur dioxide in the interval 0.12-0.16 on any of these days. You were asked to prepare a frequency distribution table, regarding the concentration of sulphur dioxide in the air in parts per million of a certain city for 30 days.On the left is the event of interest, and on the right is the event we are assuming has occurred. You can think of the line as representing “given”. The image below shows the common notation for conditional probability. Conditional probability examples with tables Conditional probability examples with the formula Summary.