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.
Arpita Saxena said:
8 years ago
But can it also be like;
All numbers are 0.
Therefore sum =0,
And sum/20 = avg.
Therefore 0/20 = 0.
Hence 0 be the answer.
All numbers are 0.
Therefore sum =0,
And sum/20 = avg.
Therefore 0/20 = 0.
Hence 0 be the answer.
Dinesh said:
8 years ago
I can't understand this problem. Please anyone help me.
Amar said:
8 years ago
10 + and 10 - nos gives answer 10 but the correct answer is 19 because he asked most of nos.
Srj said:
8 years ago
Thanks @Tarun.
Praneeth said:
8 years ago
Let assume 10 numbers above 0 (2,3,4,5,6,7,8,9,10).
The remaining 10 numbers are - ve (-2,-3,-4,-5,-6,-7,-9,-10).
Why can 10 be the answer?
The remaining 10 numbers are - ve (-2,-3,-4,-5,-6,-7,-9,-10).
Why can 10 be the answer?
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.
Kotana narendra Kumar said:
8 years ago
In question, they mentioned atmost Which Means a maximum number of possibilities.
So 19 is the right one.
So 19 is the right one.
Divya said:
8 years ago
Can't understand friends
Aman said:
8 years ago
Thanks @Harika.
(1)
Ravi said:
8 years ago
Listen, guys.
Question is at most numbers are greater than zero. At most mean maximum.
So let's do.
Av of 20 no are zero.
Lets count.
0+1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19/20=0. Ok.
Count how many no are greater than zero? 19 then answer is 19.
Question is at most numbers are greater than zero. At most mean maximum.
So let's do.
Av of 20 no are zero.
Lets count.
0+1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19/20=0. Ok.
Count how many no are greater than zero? 19 then answer is 19.
(1)
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