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 3 of 14.
Anu said:
1 decade ago
Thank you tarun.
I can understand your explanation.
I can understand your explanation.
Laxmi said:
1 decade ago
Thank you king praba. Your explanation was good.
Ameer said:
1 decade ago
We have to atmost possible values to get sum is zero.
Let 19 num are from 1 to19 &their sum is 190 if we have 20th num as -190 we get total sum is zero.so avg is also zero.
We can have positive num whose range is {1<=num<=19}.hope u will understand.
Let 19 num are from 1 to19 &their sum is 190 if we have 20th num as -190 we get total sum is zero.so avg is also zero.
We can have positive num whose range is {1<=num<=19}.hope u will understand.
Ameer said:
1 decade ago
We can't get sum zero with out a -ve number. The cases are
Pos Neg
1 19
2 18
and so on..
19 1
Here he given that max +ve values to get sum is zero soa ans is 19.
Pos Neg
1 19
2 18
and so on..
19 1
Here he given that max +ve values to get sum is zero soa ans is 19.
Sree said:
1 decade ago
Am not clear vth above answers. Still I'm in dilemma. ?
Abhay said:
1 decade ago
Praveen answer is the best one to understand this problem.
Good praveen.
Good praveen.
Harish said:
1 decade ago
How can an age can be negative?
Shekhar said:
1 decade ago
Absolutly right.
How can age be negative?
How can age be negative?
Aishwarya said:
1 decade ago
@ tarun
your explanations seems the correct one.
your explanations seems the correct one.
Jordan said:
1 decade ago
@tarun.
Your answer is the best.
Your answer is the best.
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