Answer:
[tex]\large \boxed{\text{\$3.50}}[/tex]
Step-by-step explanation:
The mean is the sum of the allowances divided by the number of students.
[tex]\text{Mean}= \dfrac{7(0) + 5(3) + 7(5) + 3(6) + 2(8)}{24}= \dfrac{0 + 15 + 35 + 18 + 16}{24} = \mathbf{3.50}\\\text{The mean weekly allowance is $\large \boxed{\textbf{\$3.50}}$}[/tex]