Question

If the mean of the four

numbers: 4,8,
X and 12 is 10.
then x is?
A)10
B)4
C)12
D)16
​

Answer 1

D) 16, because in order to get the mean you must sum up all numbers and then divide them by how many numbers there is 4 + 8 + 12 + 16 = 40/4 = 10