16/2 : the first one
Step-by-step explanation:
You take how many treats in all and divide by the number of treats to find how many dogs visited. 
 
        
                    
             
        
        
        
Answer by JKismyhusbandbae: The mean is the average of all the numbers.  You add all the numbers and divide by how many numbers you added to get the mean.
 
        
                    
             
        
        
            
            
                Let A = {0,1,2,3,4,5}<br>B = {2,4,6,8}<br>C= {1,3,5,7}<br>Verity (AUB) UC=AU (BUC) <br> 
                Angelina_Jolie [31]             
         
        
<em><u>Hope</u></em><em><u> </u></em><em><u>this</u></em><em><u> </u></em><em><u>will</u></em><em><u> </u></em><em><u>help</u></em><em><u> </u></em><em><u>u</u></em><em><u>.</u></em>
<em><u>If</u></em><em><u> </u></em><em><u>my</u></em><em><u> </u></em><em><u>ans</u></em><em><u> </u></em><em><u>was</u></em><em><u> </u></em><em><u>helpful</u></em><em><u>,</u></em><em><u> </u></em><em><u>u</u></em><em><u> </u></em><em><u>can</u></em><em><u> </u></em><em><u>follow</u></em><em><u> </u></em><em><u>me</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>
 
        
                    
             
        
        
        
Based on the picture, PC = PD