The average (arithmetic mean) of 20, 40, and 60 is 4 more than the average of 10, 70, and what number?  Choose one
A) 28 B) 25 C) 35 D) 45 E) 55
a1 = 120/3= 
<gadget id="calculator">120/3</gadget>
<output>40</output>
40   a2= a1 -4 = 36   sum of second list = 36*3= 
<gadget id="calculator">36*3</gadget>
<output>108</output>
108   therefore the number= 108 -80= 
<gadget id="calculator">108 -80</gadget>
<output>28</output>
28   28NSWER:28
<result>A</result>
The average (arithmetic mean) of 20, 40, and 60 is 4 more than the average of 10, 70, and what number?