If the sum of six numbers is between 135 and 164, then the average (arithmetic mean) of the six numbers could be which of the following? Select:
A) 15.4.
B) 20.5.
C) 25.5.
D) 31.25.
E) 32.5.
135/6= 
<gadget id="calculator">135/6</gadget>
<output>45/2 = around 22.5</output>
22.5   164/6=27.33   Only C fits in between these two limits.   Answer: 25.5.
<result>C</result>
If the sum of six numbers is between 135 and 164, then the average (arithmetic mean) of the six numbers could be which of the following?