Can you always show that a prediction based
on theoretical probability is true by
performing the event often enough? if so,
explain why. if not, describe a situation
that justifies your response.

Well no, according to the very definition of probability. It is only theoretically probable, and therefor does not necessarily always occur in that exact ratio. For example, if you flip a coin 100 times, you probably won't get heads 50 times and tails 50 times, even though it may be mathematically probable, because it is still unlikely in the real world.