The arithmetic mean of the set S = {8, K, 7, 13, M, 8} is 9. If K and M are integers, and K ≠ M, what is the median of the numbers in the set?	Pick.
A) 7	B) 7.5	C) 8	D) 8.5	E) 9
The sum of the numbers is 6*9= 
<gadget id="calculator">6*9</gadget>
<output>54</output>
54   K+M= 54 - 13 - 8 - 8 - 7= 
<gadget id="calculator">54 - 13 - 8 - 8 - 7</gadget>
<output>18</output>
18   Since K ≠ M, K and M do not equal 9.   Thus one of the two numbers is 8 or less and one is 10 or more.   Then middle two numbers in the set are 8 and 8.   The median is 8.   The answer is 8.
<result>C</result>
The arithmetic mean of the set S = {8, K, 7, 13, M, 8} is 9. If K and M are integers, and K ≠ M, what is the median of the numbers in the set?