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The mean of five numbers is 27. If one number is excluded, their mean is 25. Find the excluded number.

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The mean of five numbers is 27. If one number is excluded, their mean is 25. Find the excluded number.

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The mean of the numbers is 27

The sum of 5 numbers = 5 * 27

= 135

If one number is excluded, then the new mean is 25

Therefore sum of new numbers = 4 * 25

= 100

Therefore, excluded number = 135 – 100

= 35

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