The average (arithmetic mean) of 20, 40, and 60 is 5 more than the average of 10, 80, and what number? Choose the correct option
A) 35
B) 30
C) 25
D) 20
E) 15
a1 = 120/3= 
<gadget id="calculator">120/3</gadget>
<output>40</output>
40   a2= a1 -5 = 35   sum of second list = 35*3= 
<gadget id="calculator">35*3</gadget>
<output>105</output>
105   therefore the number= 105 -90= 
<gadget id="calculator">105 -90</gadget>
<output>15</output>
15   15
<result>E</result>
The average (arithmetic mean) of 20, 40, and 60 is 5 more than the average of 10, 80, and what number?