Question

mean of 5 numbers is 30.if one number is excluded,their mean becomes 28.find the excluded number

Answer 1

The mean of 5 numbers is 30.
Therefore, sum of 5 numbers=5*30=150
Now, If one number is excluded the mean becomes 28.
Therefore, sum of 4 numbers=4*28=112
Hence, the excluded number=150-112=38

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Answer 2

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