The average of ten numbers is 0. In those 10, at the least, how many may be greater than or equal to zero?	Choose the correct answer.
A) 0  B) 1  C) 2  D) 3  E) 5
Explanation :   Average of 10 numbers = 0   Sum of 10 numbers =(0 x 10) =0.   It is quite possible that 9 of these numbers may be negative and if there sum is -a, then 10th number is (a).   Answer : 1
<result>B</result>
The average of ten numbers is 0. In those 10, at the least, how many may be greater than or equal to zero?