The average (arithmetic mean) of the integers from 200 to 800, inclusive, is how much greater than the average of the integers from 50 to 300, inclusive?	Choices: A) 450 B) 375 C) 400 D) 425 E) 300
For an AP the mean or average of series is average of first and last term.   So, average of numbers between 200 to 800, inclusive = (200+800)/2= 
<gadget id="calculator">(200+800)/2</gadget>
<output>500</output>
500   average of numbers between 50 to 300, inclusive= (50+300)/2= 
<gadget id="calculator">(50+300)/2</gadget>
<output>175</output>
175   difference= 500 - 175 = 425   Answer is 425
<result>D</result>
The average (arithmetic mean) of the integers from 200 to 800, inclusive, is how much greater than the average of the integers from 50 to 300, inclusive?