The answer is the second option: 24 TVs.
The explanation is shown below:
To solve this exercise you must apply the proccedure shown below: The problem says that Miguel sold 8 televisions in 2.5 hours. Then, to calculate the number of televisions that he can expect to sell in 7.5 hours, you must multiply this amount of hours by 8 televisions and divide it by 2.5 hours, as following:
[tex]\frac{(7.5)(8)}{2.5}=24[/tex]