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 8 of 14.
AJAY said:
1 decade ago
@Swathy.
In question it is asking for at most how many number Greater then zero.
So answer can't be 10.
In question it is asking for at most how many number Greater then zero.
So answer can't be 10.
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.
Md. Zahidur Rahman said:
10 years ago
1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1-19.
0>1
Here 1 is 19
Negative number -19
SO answer is 19.
0>1
Here 1 is 19
Negative number -19
SO answer is 19.
Rajesh said:
1 decade ago
This answer is not a understand so clearly the sum and clean explain. How this answer is possible?
Jeevanandham said:
2 decades ago
Please try this:
Sum of 10 +ve no's + 10 -ve no's = 0
So, sum is zero.
The answer may be 20.
Sum of 10 +ve no's + 10 -ve no's = 0
So, sum is zero.
The answer may be 20.
Vignesh said:
8 years ago
For example : The Sum of first 19 number is 20 and the last number is -20. Therefore 20 -20 = 0.
Subash said:
7 years ago
@Sai.
In the question, they had given AT THE MOST.
So, the maximum value must be the answer.
In the question, they had given AT THE MOST.
So, the maximum value must be the answer.
Amar said:
8 years ago
10 + and 10 - nos gives answer 10 but the correct answer is 19 because he asked most of nos.
Sandeep said:
1 decade ago
What if there is 10 positive numbers and 10 negative numbers? Then the answer may be 10.
Seeramsetty kavya said:
8 years ago
Why can't there be less than 19 positive numbers?
For example : 1+2+3+0+4+5--------19.
For example : 1+2+3+0+4+5--------19.
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