Answer:
From least to Greatest: B, C, A 
Explanation:
For each recipe, dividing the number of bananas needed by the number of muffins will give us the number of bananas per muffin.
- A: 3/12 = 0.25
- B: 5/24 = 0.21
- C: 11/24 = 0.23
As you can see here, Recipe  A gives you  0.25  Bananas per muffin, Recipe  B  gives you 0.21  Bananas per muffin and recipe C will give you 0.23 Bananas per muffin.
Hope this helps!