Answer:
[tex]2\ cups\ of\ milk[/tex]
Step-by-step explanation:
we know that
Using proportion
[tex]\frac{(2/3)}{1}\frac{cups\ of\ milk}{batch\ of\ muffins}=\frac{x}{3}\frac{cups\ of\ milk}{batches\ of\ muffins}\\ \\x=3*(2/3)\\ \\x=2\ cups\ of\ milk[/tex]