Question 139

The average of 26 numbers is zero. Of them, how many may be greater than zero, at the most?

Solution

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Given that the average of 26 numbers is zero.
Then, Sum of 26 numbers = 0
In that, If sum of 25 numbers is 25a, then the 26th number should be -25a.
Hence, Maximum 25 numbers can be greater than zero.

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