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 2 of 14.
Naim said:
1 decade ago
Hi, even i didn't understood the question asked and solution provided. Even if one number is greater than zero than average has to change then howcome stil zero and especially answer provided 19.
Pls explain
Pls explain
Swathy said:
1 decade ago
@Tarun your answer s perfect but i have one doubt that if 10 nos are positive n 10 nos are negative means also the average will be zero? i mean for example (11,12,14,15,16,4,6,8,7,9,-11,-12,-14,-15,-16,-4,-6,-8,-7,-9)it mean also the average will be zero, so y the answer may be 10 for this problem?
Chandbasha said:
1 decade ago
hi harika i understand this about ur explanation. thank you
Sudheer said:
1 decade ago
thank u harika . all the best
King praba said:
1 decade ago
Hi,
We know the formula.average=sum of observations/number of observations.
sum=0(given)..no.of observation=20..sub in above formula 0/20=0..sum of 20 numbers is
0+1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19.........
among above numbers 0<remaining numbers.
so the remaining numbers are 19(ans)
We know the formula.average=sum of observations/number of observations.
sum=0(given)..no.of observation=20..sub in above formula 0/20=0..sum of 20 numbers is
0+1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19.........
among above numbers 0<remaining numbers.
so the remaining numbers are 19(ans)
Bhavin said:
1 decade ago
Pravin, Harika.
Thank you very much for your explanations.
Thank you very much for your explanations.
Mrs pallavi said:
1 decade ago
Hey tarun you explained very nicely good keep it up.
Amit said:
1 decade ago
0+0+0+0+0+0+0+0+0+0+0+0+0.....up 2 18th term
than
+100-100...
Wats gonna b answer ...my dear frns answer is 1.
than
+100-100...
Wats gonna b answer ...my dear frns answer is 1.
Arafat said:
1 decade ago
Write a java program which will print sum of 5 numbers but each number should not be more than 12. Help any1 plz!!!!!!!
Nilesh said:
1 decade ago
Dear read Tarun is right,the question carefully.
The question ask "at the most".
So you have to give maximum numbers that can be positive,.
And that is 19.
The question ask "at the most".
So you have to give maximum numbers that can be positive,.
And that is 19.
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