To calculate the probability of two or more events occurring simultaneously, consider whether events are independent or dependent. If they are independent, the simple multiplication rule is used:

P(outcome 1 AND outcome 2) = P(outcome 1) * P(outcome 2)

For example, to calculate the probability of receiving an email with free entry to a tech event and re-organization occurring in your workplace, this simple multiplication rule would be used. The two events are independent as the occurrence of one does not affect the chance of the other occurring

If receiving the tech event email has a probability of 31% and the probability of staff re-organization is 82%, then the probability of both occurring is calculated as follows:

P(email AND re-organization) = P(email) * P(re-organization) = (0.31) * (0.82) = 0.2542 (25%)