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.
Shalini said:
4 years ago
But how? Explain please.
(2)
Navin said:
4 years ago
Answer is 10.
(2)
Saurabh said:
4 years ago
I don't understand this, please explain shortly.
(3)
Pradnyesh said:
4 years ago
@Tarun.
Good explanation.
Good explanation.
(2)
MRP said:
4 years ago
Given avg of 20 number is 0.i.e 20 * 0 = 0.
And also they given almost i. e less than 20.so 19 because to get the sum as zero if we take 19 +ve numbers and 20th is -ve number which is equivalent to the sum of 19no.s(152+ve means -152ve). Then we get sum as 0.
Mainly in atmost they didn't mention almost 12 like that so it's better to take up to 19.
And also they given almost i. e less than 20.so 19 because to get the sum as zero if we take 19 +ve numbers and 20th is -ve number which is equivalent to the sum of 19no.s(152+ve means -152ve). Then we get sum as 0.
Mainly in atmost they didn't mention almost 12 like that so it's better to take up to 19.
(6)
Kavya said:
4 years ago
Thanks for explaining @Tarun.
Aniket said:
4 years ago
It is not understanding. please, anybody, help me to get it
Jahnavi said:
5 years ago
@Ameer and @Tarun.
Both your explanation is good. I agree.
Both your explanation is good. I agree.
Shehzad adil said:
5 years ago
0 = (numbers sum)/20.
0*20 = (numbers sum).
0 = (numbers sum).
Note :-
None of the numbers was Greater than 0.
So, the answer is "0"
0*20 = (numbers sum).
0 = (numbers sum).
Note :-
None of the numbers was Greater than 0.
So, the answer is "0"
(1)
Shehzad adil said:
5 years ago
Average can't be zero even if any of the numbers is greater than zero.
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