10, 18, x, 14
The median of the list of positive integers above is 12. Which of the following could be the average (arithmetic mean) of the list? Choose the correct choice:
A) 12
B) 5.5
C) 6.25
D) 7
E) 7.5
GivenThe median of the list of positive integers above is 12   So arranging the numbers from lowest to highest, avg of 2 middle terms needs to be 12   so the sequence will be x 10 14 18   Lets say x = 6, which gives us mean = sum/4 = 12   12 is correct
<result>A</result>
10, 18, x, 14
The median of the list of positive integers above is 12. Which of the following could be the average (arithmetic mean) of the list?