The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?	Pick one
A) 17 B) 16 C) 17 D) 19 E) 62
Average of 20 numbers = 0   Sum of 20 numbers = (0 * 20)= 
<gadget id="calculator">(0 * 20)</gadget>
<output>0</output>
0   It is quite possible that 19 of these numbers may be positive and if their sum is a, then 20th number is (-a).   Answer: 19
<result>D</result>
The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?