What was the question for this implicit rationale, and corresponding answer?
Marnie bought 50 x 5 = 250 beads from the 5 bags of 50 beads. She also bought 100 x 2 = 200 beads from the 2 bags of 100 beads. She has a total of 250 + 200 = 450 beads. Hence, she will be able to make 450 / 50 = 9 bracelets.
 The answer: 9
The question: Marnie makes bead bracelets. She bought 5 bags of 50 beads and 2 bags of 100 beads. If 50 beads are used to make one bracelet, how many bracelets will Marnie be able to make out of the beads she bought?