Sarah had 2 identical containers completely filled with blue and red marbles.
Both containers have the same total number of marbles. The ratio of the number
of blue marbles to the number of red marbles in Container A was 5 : 1 and in
Container B was 6 : 1. She poured all the marbles from both containers into a big
pail. What was the ratio of the number of blue marbles to the number of red
marbles in the pail?