Final answer:
Noah's sister put 8 stickers in each bag. After Noah places 12 erasers into 4 bags, the remaining 32 items out of the total 44 must be stickers. Dividing 32 stickers by 4 bags gives us 8 stickers per bag.
Step-by-step explanation:
The question concerns a problem that requires solving for the number of stickers Noah's sister puts in each gift bag for a birthday party. To find the solution, we can use basic algebra. Noah places 3 pencil erasers in each bag. If they have filled 4 bags, Noah has put 3 x 4 = 12 pencil erasers in all the bags. With a total of 44 items used, and knowing Noah has placed 12, we can calculate the stickers as follows:
- Total items = total erasers + total stickers.
- 44 items = 12 erasers + (Number of stickers per bag x 4 bags).
- 44 items = 12 + (Number of stickers per bag x 4).
- We then solve for the number of stickers per bag: (44 - 12) / 4 = 32 / 4 = 8 stickers per bag.
Therefore, Noah's sister put 8 stickers in each bag, which corresponds to option (a).