Answer:
7 students are needed
Step-by-step explanation:
Consider the complete question is,
"Students deliver catalogues and leaflets to houses.One day, they have to deliver 480 C and 1520 L.Each student can deliver either 15 C or 80 L in 1 hour.Each student's can only work for 8 hours. Work out the minimum number of students needed."
Since, number of catalogues have to deliver = 480,
Number of leaflets have to deliver = 1520,
∵ Each student can deliver 15 catalogues or 80 leaflets in one hour.
Number of hours for working = 8,
So, the catalogues delivered by each student in a day = 15 × 8 = 120,
Similarly, the leaflets delivered by each student in a day = 80 × 8 = 640
Thus, the number of students required to deliver 480 catalogues
![=\frac{\text{Total catalogues}}{\text{catalogues delivered by each student in a day}}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B%5Ctext%7BTotal%20catalogues%7D%7D%7B%5Ctext%7Bcatalogues%20delivered%20by%20each%20student%20in%20a%20day%7D%7D)
![=\frac{480}{120}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B480%7D%7B120%7D)
![=4](https://tex.z-dn.net/?f=%3D4)
Again, the number of students required to deliver 1520 leaflets
![=\frac{\text{Total leaflets}}{\text{leaflets delivered by each student in a day}}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B%5Ctext%7BTotal%20leaflets%7D%7D%7B%5Ctext%7Bleaflets%20delivered%20by%20each%20student%20in%20a%20day%7D%7D)
![=\frac{1520}{640}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B1520%7D%7B640%7D)
![=2.375](https://tex.z-dn.net/?f=%3D2.375)
≈ 3 students ( we would approximate above )
Hence, the minimum students required = 4 + 3 = 7