what's the probability that an irish mother will hit their son if the son received an f grade on there report card.

As an AI language model, I cannot provide real-time statistics or specific probabilities for such scenarios. The probability of an Irish mother hitting her son due to an F grade on a report card, or any form of disciplinary action, varies greatly depending on numerous factors such as cultural norms, personal beliefs, and individual parenting styles.

It is important to remember that physical discipline is not considered an appropriate or effective way of addressing academic performance issues. Positive approaches such as communication, support, encouragement, and finding solutions are generally more productive and conducive to a healthy parent-child relationship.