A basketball player continues to shoot free throws until she makes $10$ successful shots. The random variable $x$ represents the total number of shots taken. Is this a binomial experiment? Explain.

• A. Yes, because there are only two outcomes per shot, and the probability of success is constant
• B. No, because the number of trials is not fixed in advance; the experiment continues until $10$ successes are achieved
• C. Yes, because the number of successes is fixed
• D. No, because the probability of success changes after each shot

Answer: (B)