Add them together and divide by the number of values (4).
The average is (11+11+13+17)/4 = 52/4 = 13
The average is 16.
16.6
13.285714 repeating
11 13 15 17 19
11 13 17
13. (9+17)/2=13
If: 11x+13y = 17 Then: 11/17x +13/17y = 1 by dividing all terms by 17 So: 11/17*17/22+13/17*17/26 = 1 because 1/2+1/2 = 1 Therefore: x = 17/22 and y = 17/26 Check: 11(17/22) + 13(17/26) = 17 Check: 11(17/22) times 13(17/26) = 72.25
The LCM of 11, 13, and 17 is 2431
11, 13, 17, 19
Average = 13
7 x 11 x 13 x 17 = 17017