The average of fifteen numbers is 0. In those 15, at the most, how many may be greater than zero?
Choose the correct answer
A) 0 B) 1 C) 10 D) 14 E) 17
Explanation :   Average of 15 numbers = 0   Sum of 15 numbers =(0 x 15) =0.   It is quite possible that 14 of these numbers may be positive and if there sum is a, then 15th number is (-a).   Answer : 14
<result>D</result>
The average of fifteen numbers is 0. In those 15, at the most, how many may be greater than zero?