Melanie baked 10 batches of brownies, with 20 brownies in each batch. She set aside 3/4 of the brownies in each batch for a bake sale, put 3/5 of the remaining in a container, and gave out the rest. How many brownies are given out?
Thoughts? Step-by-step reasoning:
Melanie set aside 20 x 3 / 4 = 15 brownies from each batch for a bake sale. So, there are 20 - 15 = 5 brownies that are not for bake sale from each batch. Out of the 5, 5 x 3 / 5 = 3 brownies are kept in a container from each batch. Thus, 5 - 3 = 2 brownies are given out from each batch. Therefore, a total of 2 x 10 = 20 brownies are given out from the 10 batches.
Thus, the answer is 20.