The average (arithmetic mean) of eight numbers is 43.1. If the sum of half of these numbers is 158.4, what is the average of the other half? Select:  A) 12.8  B) 24.2  C) 46.6  D) 72.1  E) 96.8
arithmetic mean = sum / total numbers   sum = 43.1 * 8= 
<gadget id="calculator">43.1 * 8</gadget>
<output>344.8</output>
344.8   sum of half of these numbers is 158.4. So, 4 numbers sum is 158.4. Rest 4 numbers sum= 344.8-158.4= 
<gadget id="calculator">344.8-158.4</gadget>
<output>186.4</output>
186.4   Arithmetic mean of the 4 nos= 186.4/4= 
<gadget id="calculator">186.4/4</gadget>
<output>46.6</output>
46.6   Hence, 46.6 is the answer.
<result>C</result>
The average (arithmetic mean) of eight numbers is 43.1. If the sum of half of these numbers is 158.4, what is the average of the other half?