Distances that cross country team members ran 3,10,4,5,7,7,8,6,7,10 and 10 find mean and median

To get the mean , we must add every number in the data set, and divide them by how many there are.

: 3+10=13 , 13+4=17 , 17+5=22 , 22+7=29 , 29+7=36 , 36+8=44 , 44+6=50 , 50+7=57 , 57+10=67 , and 67+10=77.  

Now we have to divide : 77 / 11 = 7 , my reason being is because 7*11=77
The mean is 7


Now lets see what the median is , first we have to find the two even or odd numbers which happen to be 7 & 10. We have to add the two together and than divide it by 2 since there are 2 of them. 

7 + 10 = 17           ,           17 / 2 =  8.5
 
 8.5 is the Median.

 I hope this helps you a lot :)

          

The clear answer is clearly 25 is very clear to me