To find out how many apples were sold as fresh fruit, we first determine how many apples were discarded as defective.
Sara discarded \( \frac{1}{10} \) of the 200 apples:
\[ \text{Defective apples} = \frac{1}{10} \times 200 = 20 \]
Next, we subtract the defective apples from the total apples picked to find the amount sold as fresh fruit:
\[ \text{Fresh apples} = 200 - 20 = 180 \]
Therefore, the number of apples sold as fresh fruit is 180.