Based on the given information, Edgar needs eggs and sausages in the ratio of 3:2. We know that he is going to use 12 eggs.
Looking at the tape diagram, we can see that the eggs are represented by a set of three adjacent rectangles, and the sausages are represented by a set of two adjacent rectangles. The upward-facing bracket above the center rectangle in the eggs section points to the number 12.
Since the ratio of eggs to sausages is 3:2, we can determine that the three rectangles represent the 3 parts of the ratio for eggs, and the two rectangles represent the 2 parts of the ratio for sausages.
Therefore, if the total number of parts is 5 (3 parts for eggs + 2 parts for sausages), and we know that there are 12 eggs, we can set up a proportion:
3 parts/5 parts = 12 eggs/x sausages
By cross-multiplying, we get:
3 * x = 5 * 12
3x = 60
Dividing both sides by 3, we find:
x = 20
Therefore, Edgar needs 20 sausages.
So the correct answer is:
20 sausages.