Answer:[tex]P=\frac{2}{5}[/tex]
Step-by-step explanation:
Given
A movie theater has 7 seats in the front row
12 seats in the middle row
11 seats in the back row
Probability first person who enters the theater will be in the middle row
[tex]P=\frac{\text{No. of middle seats}}{\text{total seats}}[/tex]
[tex]P=\frac{12}{7+12+11}=\frac{12}{30}[/tex]
[tex]P=\frac{2}{5}[/tex]