Answer:
3 dozens
Explanation:
If each recipe takes 2 eggs and we are making 18 batches of that recipe we can say that the total number of eggs we are going to need is 2 * 18 or 36 eggs.
In a dozen eggs, there are 12 eggs, so we can divide 36 by 12 to find the number of dozens we will need. 36/12 = 3