1. The problem is to find out how much change a student would receive if they pay with a 50 note. 2. To determine the change, we need to know the total cost of the items or services the student is paying for. 3. Let the total cost be $C$. 4. The change received is calculated by subtracting the total cost from the amount paid. 5. Therefore, the change $\text{Change} = 50 - C$. 6. Without the value of $C$, we cannot find the exact change. 7. If you provide the total cost, I can calculate the exact change for you.