What is known?
She makes 6 out of 10.
\(\displaystyle 10 \rightarrow 6\)
\(\displaystyle 25 \rightarrow x\)
\(\displaystyle x= \frac{25 \cdot6}{10} = \frac{5\cdot6}{2} = \frac{30}{2} =15\)
Answer: If she attempted to make 25 baskets, she'd make 15 out of 25.
HTH ;)