Answer: There are 96 students who attend Chess club on Wednesday.
Explanation:
Since we have given that
Total number of students in challenger Middle school = 800
Percentage of students stay after school for chess club in Wednesday = 12%
So, Number of students who attend Chess club on Wednesday is given by
![(12)/(100)* 800\\\\=12* 8\\\\=96](https://img.qammunity.org/2020/formulas/mathematics/high-school/6ca6au3rdql2r1w7vba5a9vy0sd9hkqlbb.png)
Hence, there are 96 students who attend Chess club on Wednesday.