The average of 13 numbers is 60. Average of the first 7 of them is 55 and that of the last 7 is 61. Find the 8th number?  Select
A) 32	B) 83	C) 45	D) 53	E) 64
Sum of all the 13 numbers = 13 * 60= 
<gadget id="calculator">13 * 60</gadget>
<output>780</output>
780   Sum of the first 7 of them= 7 * 55= 
<gadget id="calculator">7 * 55</gadget>
<output>385</output>
385   Sum of the last 7 of them= 7 * 61= 
<gadget id="calculator">7 * 61</gadget>
<output>427</output>
427   So, the 8th number= 427 + 385 - 780= 
<gadget id="calculator">427 + 385 - 780</gadget>
<output>32</output>
32.   32nswer:32
<result>A</result>
The average of 13 numbers is 60. Average of the first 7 of them is 55 and that of the last 7 is 61. Find the 8th number?