The mean of 5 numbers is 27.excluded number is 1. their mean is 25. find the included number
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The mean of 5 number is 27.So, the total sum of 5 numbers will be 27*5=135.
The new mean of 4 numbers is 25.So, the total sum of 4 numbers will be 25*4=100.
If we subtract the two means we can get the excluded number which is 135–100=35
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