People commit the Gambler's Fallacy very often in real life. A common example of this goes something like:

"X happens about half the time, but it's happened only 7 out of the last 30 times! That's ridiculous, but things have a way of evening out. Over the next 30 times I expect X to occur about __ time(s)."

While the correct answer is 15, this person committing the Gambler's Fallacy is most likely to believe (based on the statement above) that X should on average happen how many of the next 30 times?