The average of 20 numbers is zero. Of them, How many of them may be greater than zero, at the most? Choose the correct choice from the following choices:
A) 19 B) 20 C) 10 D) 15 E) 17
19vg of 20 numbers = 0   sum of 20 nos/20 = 0   sum of 20 nos = 0 =&gt; there can be 19 positive nos   19NSWER 19
<result>A</result>
The average of 20 numbers is zero. Of them, How many of them may be greater than zero, at the most?