10 11 10 y 10 8

If the mean is 10 what number could y be?

To find the mean of a number sequence, add all the numbers together and divide them by the number of numbers used ...

10 + 11 + 10 + 10 + 8 = 49

49 : 5 = 9.8

The mean does not match 10, so make up numbers untill it matches.

10 + 11 + 10 + 10 + 8 + 6 : 6

= 10!

The anwser would be y = 6