SOLUTION: the mean of five positive numbers is 4 when another number is added ,the mean number becomes 8 .find the number added

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Question 1040695: the mean of five positive numbers is 4 when another number is added ,the mean number becomes 8 .find the number added
Answer by ikleyn(52794)   (Show Source): You can put this solution on YOUR website!
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the mean of five positive numbers is 4 when another number is added ,the mean number becomes 8. find the number added
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 = 4*5 = 20   <--- The sum of the five numbers.

 = 8*6 = 48   <--- The sum of the six numbers.

 =  + x  --->  x =  = 48 - 20 = 28.

Answer. The number 28 was added.

Notice. The condition that the numbers are positive - is irrelevant.


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