The average of 21 numbers is zero. Of them, at most, how many may be greater than zero?

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None of these

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Solution

The correct option is D
20

Average of 21 numbers = 0. Sum of 21 numbers = 0. It is quite possible that 20 of these numbers may be positive and if their sum is a, then 21st number is (-a).

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The average of 21 numbers is zero. Of them, at most, how many may be greater than zero?

The correct option is D 20 Average of 21 numbers = 0. Sum of 21 numbers = 0. It is quite possible that 20 of these numbers may be positive and if their sum is a, then 21st number is (-a).

The correct option is D
20

Average of 21 numbers = 0. Sum of 21 numbers = 0. It is quite possible that 20 of these numbers may be positive and if their sum is a, then 21st number is (-a).