There are 72 broken eggs. One dozen is equal to 12. That means the total number of egg cartons is 36. You can solve this by simply multiplying 3x12 (3 dozen egg cartons is 3 groups of 12 cartons).
If there are 2 broken eggs in each carton, then you multiply 2 by the total number of cartons you have, which would be 2 x 36 = 72. There are 72 broke eggs.