To find the mean of the number of cookies baked by the students, we will first list the number of cookies baked by each individual:
- Jill: 0
- William: 10
- Finn: 20
- Rodrigo: 30
- Nick: 40
- Charlotte: 50
Now, we add these numbers together:
\( 0 + 10 + 20 + 30 + 40 + 50 = 150 \)
Next, we find the number of students, which in this case is 6.
To find the mean, we divide the total number of cookies by the number of students:
\[ \text{Mean} = \frac{\text{Total number of cookies}}{\text{Number of students}} = \frac{150}{6} = 25 \]
Thus, the mean number of cookies baked by the students is 25.