What is the average (arithmetic mean) of the numbers 100, 150, 200, 200, 250, and 300?  Options:
A) 100 B) 150 C) 140 D) 200 E) 250
{100, 150, 200, 200, 250, 300}={200-100,200-50, 200, 200,200+50,200+100} --&gt; the average = 200.   Answer: 200.
<result>D</result>
What is the average (arithmetic mean) of the numbers 100, 150, 200, 200, 250, and 300?