In the question, we are required to find the average number of pictures taken by the cameras per time.
We can get this by the equation below:
[tex]\text{Average picture(s) per time =}\frac{\text{ Total pictures taken}}{\text{ total time taken}}[/tex]First Camera:
[tex]\text{Average picture(s) per time = }\frac{80}{10}=8\text{pictures per second}[/tex]Second Camera:
[tex]\text{Average picture(s) per time = }\frac{45}{5}=9\text{pictures per second}[/tex]Third Camera:
[tex]\text{Average picture(s) per time = }\frac{56}{8}=7\text{pictures per second}[/tex]The fastest camera is that which takes the most pictures in a time interval as compared to the others.
In this case, THE SECOND CAMERA