Answer:
![(4)/(15)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/6hlsn072jb0kdbn7vhk5ybi2aunu7we97o.png)
Explanation:
The number of seats in the first row= 8
Total number of seats in the classroom=
![8+10+12=30](https://img.qammunity.org/2020/formulas/mathematics/middle-school/vmnacxyruphao7aclaxwc1e8fgmd0662l2.png)
The probability of the first student who enters the classroom will be assigned a seat in front row is given by:-
![P=\frac{\text{Number of seats in first row}}{\text{Total seats}}\\\Rightarrow\ P=(8)/(30)=(4)/(15)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/z40zujol3najwr7bczoj0g9ajc4ftmwfur.png)
Therefore, the probability of the first student who enters the classroom will be assigned a seat in front row is
.