the average of 20 numbers is zero. of them, at the most ,how many may be greater than zero
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Average of 20 numbers = (a1 + a2 + a3 + a4......+a20)/20 = 0
a1 + a2 + a3 + a4.......+a20 = 0
a1 + a2 + a3 + a4.......+a19 = -a20
Therefore from above maximum 19 numbers can be positive (greater than zero).
Average of 20 numbers = (a1 + a2 + a3 + a4......+a20)/20 = 0
a1 + a2 + a3 + a4.......+a20 = 0
a1 + a2 + a3 + a4.......+a19 = -a20
Therefore from above maximum 19 numbers can be positive (greater than zero).
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