To find out how much of the 950-square-foot courtyard area will be dedicated to the garden, we need to calculate 20% of 950 square feet.
Here’s how you do that:
\[ \text{Area for the garden} = 950 , \text{square feet} \times 0.20 \]
Calculating that:
\[ \text{Area for the garden} = 950 \times 0.20 = 190 , \text{square feet} \]
Therefore, the students will be able to use 190 square feet for the garden.