Sara discarded \( \frac{1}{10} \) of the 200 apples as defective.
To find out how many apples she discarded: \[ \text{Defective apples} = \frac{1}{10} \times 200 = 20 \]
Now, to find out how many apples were sold as fresh fruit: \[ \text{Fresh apples} = \text{Total apples} - \text{Defective apples} = 200 - 20 = 180 \]
So, the number of apples sold as fresh fruit is 180.