Answer: She can bake 160 raisin muffins.
Step-by-step explanation:
Let the number of raisin muffins be 'x', then
The number of chocolate muffins = [tex]\frac{1}{2}x[/tex]
The number of strawberry muffins=[tex]3\times(\frac{x}{2})=\frac{3x}{2}[/tex]
Since, the total muffins she can bake 480.
Therefore,
[tex]x+\frac{x}{2}+\frac{3x}{2}=480\\\Rightarrow\frac{2x+x+3x}{2}=480\\\Rightarrow\frac{6x}{2}=480\\\Rightarrow\ x=\frac{480\times2}{6}\\\Rightarrow\ x=160[/tex]
Hence, she can bake 160 raisin muffins.