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