The average of 20, 30 and 130 is twice the average of 10, 30, and which of the following ? Pick
A) 1)10  B) 2)50  C) 3)60  D) 4)90  E) 5)180
20 30 130 = 130+50= 
<gadget id="calculator">130+50</gadget>
<output>180</output>
180/3= 
<gadget id="calculator">180/3</gadget>
<output>60</output>
60   60/2= 
<gadget id="calculator">60/2</gadget>
<output>30</output>
30   10 30 x= 40+x/3 should be smaller than 30   cross multiply 30*3-40= 
<gadget id="calculator">30*3-40</gadget>
<output>50</output>
50   2)50
<result>B</result>
The average of 20, 30 and 130 is twice the average of 10, 30, and which of the following ?