To solve this problem, we start by determining the ratio of soaked chickpeas to servings based on the original recipe.
The recipe requires:
- 3 cups of soaked chickpeas for 4 servings.
First, we find out how many cups of soaked chickpeas are needed for 1 serving:
\[ \frac{3 \text{ cups}}{4 \text{ servings}} = 0.75 \text{ cups per serving} \]
Now, since Indira wants to make 15 servings, we multiply the amount needed for one serving by 15:
\[ 0.75 \text{ cups/serving} \times 15 \text{ servings} = 11.25 \text{ cups} \]
Thus, the amount of soaked chickpeas required for 15 servings is 11.25 cups.
Correct response: 11.25 cups.