private bank exams model questions

the average of 20 numbers is 0. of them, at the most, how many be greater than zero?

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  • Here average of 20 numbers= 0.

    So we have avg = sum/20.

    That implies sum = 0.

    Now for the sum of 20 numbers to be equal to zero, there may be all 19 numbers of them >0 and only one number which is -ve of all the 19 numbers sum.

    So the answer is 19.
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