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Question 523469: The mean of five numbers is 10.If a new number is added then the mean becomes 12.Find the value of that number
Answer by oberobic(2304)   (Show Source):
You can put this solution on YOUR website! The sum of 5 numbers divided by 5 = 10, which is the average (i.e., the arithmetic mean).
So, the sum of the 5 numbers is 5*10 = 50.
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When we add a number, the average is increased to 12.
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(50+x)/6 = 12
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50+x = 72
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x = 22
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Done.
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