SOLUTION: The average of 7 numbers is 36. An eighth number is chosen so that the average is now 45. What is the eighth number.

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Question 840905: The average of 7 numbers is 36. An eighth number is chosen so that the average is now 45. What is the eighth number.
Answer by hamsanash1981@gmail.com(151) About Me  (Show Source):
You can put this solution on YOUR website!
average of 7 numbers is 36 then total number = 36*7 = 252
Now the eighth number be x and new average of 8 numbers is 45
(252+x)/8 = 45
252 + x = 360
x= 108
Therefore the 8th number is 108