Give the step-by-step reasoning process and then the final answer. Gabriel is looking at her marble sets. She sees that in the first set 10% of her marbles are broken. In the second set, 20% of the marbles are broken. The first set contains 50 marbles. The second set contains 60. How many marbles are broken in total?
In the first set there are 5 broken marbles because 50 x .1 = 5. In the second set there are 12 broken marbles because 60 x .2 = 12. There are 17 broken marbles in total because 5 + 12 = 17.
The final answer: 17.