The average of 20, 70 and 180 is twice the average of 10, 30, and which of the following ? Choose one
A) 1)10 B) 2)30 C) 3)60 D) 4)90 E) 5)95
20 70 180 = 180+90= 
<gadget id="calculator">180+90</gadget>
<output>270</output>
270/3= 
<gadget id="calculator">270/3</gadget>
<output>90</output>
90.   90/2= 
<gadget id="calculator">90/2</gadget>
<output>45</output>
45   10 30 x= 40+x/3 should be smaller than 45   cross multiply 45*3-40= 
<gadget id="calculator">45*3-40</gadget>
<output>95</output>
95   5)95
<result>E</result>
The average of 20, 70 and 180 is twice the average of 10, 30, and which of the following ?