1. **State the problem:** We need to find how many boxes of pencils the school must order to have at least 2550 pencils. 2. **Identify given information:** - Each box contains 10 packs. - Each pack contains 24 pencils. - The school needs 2550 pencils. 3. **Calculate pencils per box:** $$\text{Pencils per box} = 10 \times 24 = 240$$ 4. **Find number of boxes needed:** We divide the total pencils needed by pencils per box: $$\frac{2550}{240} = 10.625$$ 5. **Interpret the result:** Since we cannot order a fraction of a box, we round up to the next whole number: $$\lceil 10.625 \rceil = 11$$ 6. **Final answer:** The school needs to order **11 boxes** of pencils to have at least 2550 pencils.