The distribution of ages of runners in a marathon is approximately normal. The oldest participant was 80 and the youngest was 13. Which of the following statements is true of the mean and median ages of the runners?

An approximately normal distribution is roughly symmetric around its center. For a symmetric, bell-shaped distribution, the mean and median are approximately equal. The youngest and oldest ages describe the range, but they do not change this relationship, so the mean and median are approximately equal.

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