The average (arithmetic mean) of eight numbers is 47.1. If the sum of half of these numbers is 158.4, what is the average of the other half?	Answers:
A) 12.8
B) 24.2
C) 54.6
D) 72.1
E) 96.8
arithmetic mean = sum / total numbers   sum = 47.1 * 8= 
<gadget id="calculator">47.1 * 8</gadget>
<output>376.8</output>
376.8   sum of half of these numbers is 158.4. So, 4 numbers sum is 158.4. Rest 4 numbers sum= 376.8-158.4= 
<gadget id="calculator">376.8-158.4</gadget>
<output>218.4</output>
218.4   Arithmetic mean of the 4 nos= 218.4/4= 
<gadget id="calculator">218.4/4</gadget>
<output>54.6</output>
54.6   Hence, 54.6 is the answer.
<result>C</result>
The average (arithmetic mean) of eight numbers is 47.1. If the sum of half of these numbers is 158.4, what is the average of the other half?