The average (arithmetic mean) of the integers from 200 to 400, inclusive, is how much greater than the average of the integers from 100 to 200, inclusive?  Select the correct option.
A) 150 B) 175 C) 200 D) 225 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 400, inclusive = (200+400)/2= 
<gadget id="calculator">(200+400)/2</gadget>
<output>300</output>
300   average of numbers between 100 to 200, inclusive= (100+200)/2= 
<gadget id="calculator">(100+200)/2</gadget>
<output>150</output>
150   difference= 300 - 150= 
<gadget id="calculator">300 - 150</gadget>
<output>150</output>
150   150nswer is 150
<result>A</result>
The average (arithmetic mean) of the integers from 200 to 400, inclusive, is how much greater than the average of the integers from 100 to 200, inclusive?