The average of 20 numbers is zero. Of them, at the most, how many may – InterviewSolution

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The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?1). 02). 13). 104). 19

Answer»

Given that average of 20 numbers = 0

Average of 20 numbers = (sum of 20 numbers) /20

⇒ 0 = (sum of 20 numbers)/20

∴ Sum of 20 numbers = 0

Let the sum of 19 positive numbers = q

In ORDER to BECOME sum = 0, 20th number MUST be equal to (-q)

∴ At most 19 numbers can be greater than zero

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