What is the average (arithmetic mean) of all the multiples of ten from 10 to 250 inclusive?
Choose the most appropriate option:	A) 90	B) 95	C) 100	D) 130	E) 170
The multiples of ten from 10 to 250 inclusive would be an evenly spaced set with 25 terms - 10, 20, 30,.......250   So average = (First term + Last Term)/2 = (10 + 250)/2 = 260/2= 
<gadget id="calculator">260/2</gadget>
<output>130</output>
130   Hence, the correct answer is 130.
<result>D</result>
What is the average (arithmetic mean) of all the multiples of ten from 10 to 250 inclusive?