Question: User: 52, 52, 57, 67, 67, 73, 77, 89, 97 find the mean
1. **State the problem:** Find the mean of the numbers $52, 52, 57, 67, 67, 73, 77, 89, 97$.
2. **Formula for mean:** The mean (average) of a set of numbers is given by $$\text{mean} = \frac{\text{sum of all numbers}}{\text{number of numbers}}$$
3. **Calculate the sum:**
$$52 + 52 + 57 + 67 + 67 + 73 + 77 + 89 + 97 = 631$$
4. **Count the numbers:** There are $9$ numbers in total.
5. **Apply the formula:**
$$\text{mean} = \frac{631}{9}$$
6. **Simplify the fraction:**
$$\text{mean} = \frac{\cancel{631}}{\cancel{9}} = 70.111...$$ (approximately)
7. **Final answer:** The mean of the given numbers is approximately $70.11$.