If the average of 15 numbers is zero, then at least how many of them a

1.	If the average of 15 numbers is zero, then at least how many of them are positive?1. 7.52. 13. Zero4. 14
Answer» Correct Answer - Option 2 : 1 Given- Average of 15 numbers = 0. Concept Used- Average = Sum of all the observations/Number of Observations Calculation- For the average of some numbers to be zero the sum of all the negative numbers should be equal to the sum of all the positive numbers. Hence, in a set of 15 numbers we need at least one positive number which is equal to the sum of all other 14 negative numbers. ∴ At least one of the 15 numbers should be positive.

If the average of 15 numbers is zero, then at least how many of them are positive?1. 7.52. 13. Zero4. 14

Answer» Correct Answer - Option 2 : 1

Given-

Average of 15 numbers = 0.

Concept Used-

Average = Sum of all the observations/Number of Observations

Calculation-

For the average of some numbers to be zero the sum of all the negative numbers should be equal to the sum of all the positive numbers.

Hence, in a set of 15 numbers we need at least one positive number which is equal to the sum of all other 14 negative numbers.

∴ At least one of the 15 numbers should be positive.

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If the average of 15 numbers is zero, then at least how many of them are positive?1. 7.52. 13. Zero4. 14

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