Aptitude - Average - Discussion
Discussion Forum : Average - General Questions (Q.No. 4)
4.
The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?
Answer: Option
Explanation:
Average of 20 numbers = 0.
Sum of 20 numbers (0 x 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).
Discussion:
135 comments Page 10 of 14.
Prudhvi Raju said:
7 years ago
How can you say 20th number is negative?
It may have 10 positive and 10 negative numbers or may be any other combinations.
Please clarify for me.
It may have 10 positive and 10 negative numbers or may be any other combinations.
Please clarify for me.
Shreeshail karajol said:
7 years ago
Very simple.
Consider the sum of all 19 number =150.
If 20th is - 150 then,
150+(-150)=0,
Now 0/20=0.
Consider the sum of all 19 number =150.
If 20th is - 150 then,
150+(-150)=0,
Now 0/20=0.
Jeevitha S K said:
7 years ago
If it is asked as "atleast" the answer will be 1 right.
Vinay said:
7 years ago
The positive numbers from 1 to 14 addition is 105.
The negative numbers i.e. 15, 16, 17, 18, 19, 20 is -105;.
So, the sum of these numbers is 0. And average is zero hence It can only 14 positive numbers.
The negative numbers i.e. 15, 16, 17, 18, 19, 20 is -105;.
So, the sum of these numbers is 0. And average is zero hence It can only 14 positive numbers.
Chandu said:
7 years ago
Please, anybody, explain it in an easy way.
Jyothi said:
7 years ago
Thanks @Tarun & @Prabha.
Jeet said:
7 years ago
I am not getting this. Please, anyone explain me clearly.
Bharath said:
7 years ago
Thanks for the answer @Praveen.
Roopa naidu said:
7 years ago
Awesome, Thanks for the answer @Praveen.
Parag said:
7 years ago
Thanks @Praveen.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers