The average of 12 result is 55. Average of the first 6 of them is 42 and that of the last 6 is 48. Find the 8th result? Choose the correct choice from the following options.
A) 35
B) 564
C) 526
D) 48
E) 50
Sum of all the 12 results = 12 * 55= 
<gadget id="calculator">12 * 55</gadget>
<output>660</output>
660   Sum of the first 6 of them= 6 * 42= 
<gadget id="calculator">6 * 42</gadget>
<output>252</output>
252   Sum of the last 6 of them= 6 * 48= 
<gadget id="calculator">6 * 48</gadget>
<output>288</output>
288   So, the 8th number= 600 + 252 - 288= 
<gadget id="calculator">600 + 252 - 288</gadget>
<output>564</output>
564.   564
<result>B</result>
The average of 12 result is 55. Average of the first 6 of them is 42 and that of the last 6 is 48. Find the 8th result?