The mean of 20 numbers is zero.Of them,at the most,how many may be greater than zero?

(a) 0 (b) 1 (c) 10 (d) 19

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Solution

Sum of 20 numbers(0 x 20) = 0. It is quite possible that 19 of these numbers may be positive and if their sum is a then 20th number is (-a).

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The mean of 20 numbers is zero.Of them,at the most,how many may be greater than zero? (a) 0 (b) 1 (c) 10 (d) 19

Sum of 20 numbers(0 x 20) = 0. It is quite possible that 19 of these numbers may be positive and if their sum is a then 20th number is (-a).

The mean of 20 numbers is zero.Of them,at the most,how many may be greater than zero?

(a) 0 (b) 1 (c) 10 (d) 19