The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero ?
A) 0 B) -1
C) 1 D) none of these
The average of 20 numbers is zero
Answer: A) 0
Average of 20 numbers = 0.
Sum of 20 numbers = (0 * 20) = 0.
It is quite possible that 19 of these numbers may be positive and if their sum is a, then 20th number is (- a).
Subject: Average – Quantitative Aptitude – Arithmetic Ability