the mean of 5 numbers is 20 if one of the number is excluded mean of the remaining number becomes 23 find the excluded number
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Answer:
The excluded number will be 8.
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ANSWER...................,
The mean of 5 number = 20
The sum of 5 number = 5 × 20 = 100
If one number is excluded ,
Then mean of 4 number = 23
Sum of 4 number = 4 × 23 = 92
∴excluded number = 100 - 92 = 8
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