To find the probability of any event happening, we need to add up the individual probabilities of each event.
So, probability of any event happening = probability of A + probability of B + probability of C
Let's substitute the given values:
probability of any event happening = 68% + 17% + 28%
Now, let's add the percentages:
probability of any event happening = 113%
However, probabilities cannot exceed 100% since it represents certainty. Therefore, the probability of any event happening is 100%.
Answer: The probability of any event happening is 100%.