The average of 20, 100 and 180 is twice the average of 10, 30, and which of the following ? Choose the correct option.
A) 1)110  B) 2)30  C) 3)60  D) 4)90  E) 5)180
20 100 180 = 180+120= 
<gadget id="calculator">180+120</gadget>
<output>300</output>
300/3= 
<gadget id="calculator">300/3</gadget>
<output>100</output>
100   100/2= 
<gadget id="calculator">100/2</gadget>
<output>50</output>
50   10 30 x= 40+x/3 should be smaller than 50   cross multiply 50*3-40= 
<gadget id="calculator">50*3-40</gadget>
<output>110</output>
110   1)110
<result>A</result>
The average of 20, 100 and 180 is twice the average of 10, 30, and which of the following ?