It varies by state but most try to keep their salesperson pass rates at around 50%. For example, California is usually about 44% and Florida hovers between 50–55%.
However, it DOESN’T matter whether you pass on the first or fifth try because that doesn’t indicate whether you will be a successful agent or not. It’s just a “barrier to entry” which, along with the time and money involved, are designed to discourage people who are just looking to make a quick buck.
What does matter is how hard you are willing to work AFTER you pass the exam. Real estate is one of the most difficult sales jobs with only a 15% survival rate after the first three years. There’s just so much to learn while you’re trying to find people who will trust you with the most expensive transaction of their lives.