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 11 of 14.
Kathir Vtv said:
1 decade ago
20 numbers = 1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1-19/20.
= 0/20.
So total numbers are greater then 0 is 19.
Answer is 19.
= 0/20.
So total numbers are greater then 0 is 19.
Answer is 19.
Chennareddy said:
1 decade ago
@AJAY can give 20 numbers, but the last 20th number average is 0, so we don't no 19 number lesser then 0 are greater then 0, so the question is range.
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.
Ashline said:
1 decade ago
@Jeevanandham.
your logic was nice but the answer will be 10 in your case which is True but they asked for" At the most" So you need to tell maximum possible numbers that can be greater than zero in order to maintain the sum zero :).
Hope that helps :).
your logic was nice but the answer will be 10 in your case which is True but they asked for" At the most" So you need to tell maximum possible numbers that can be greater than zero in order to maintain the sum zero :).
Hope that helps :).
Ashwin said:
1 decade ago
What if the numbers are
1,2,3,4,5,6,7,8,9,10,-1,-2,-3,-4,-5,-6,-7,-8,-9,-10
then average =0
so the answer may be 20 right?
1,2,3,4,5,6,7,8,9,10,-1,-2,-3,-4,-5,-6,-7,-8,-9,-10
then average =0
so the answer may be 20 right?
Jordan said:
1 decade ago
@tarun.
Your answer is the best.
Your answer is the best.
Aishwarya said:
1 decade ago
@ tarun
your explanations seems the correct one.
your explanations seems the correct one.
Shekhar said:
1 decade ago
Absolutly right.
How can age be negative?
How can age be negative?
Harish said:
1 decade ago
How can an age can be negative?
Abhay said:
1 decade ago
Praveen answer is the best one to understand this problem.
Good praveen.
Good praveen.
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