Aptitude - Average - Discussion
Discussion Forum : Average - General Questions (Q.No. 10)
10.
In Arun's opinion, his weight is greater than 65 kg but less than 72 kg. His brother does not agree with Arun and he thinks that Arun's weight is greater than 60 kg but less than 70 kg. His mother's view is that his weight cannot be greater than 68 kg. If all are them are correct in their estimation, what is the average of different probable weights of Arun?
Answer: Option
Explanation:
Let Arun's weight by X kg.
According to Arun, 65 < X < 72
According to Arun's brother, 60 < X < 70.
According to Arun's mother, X <= 68
The values satisfying all the above conditions are 66, 67 and 68.
 Required average = |
 |
66 + 67 + 68 |  |
= | |
201 | |
= 67 kg. |
| 3 | 3 |
Discussion:
58 comments Page 1 of 6.
ANUKA said:
2 years ago
It's very simple.
Using formula,
Average = (sum of observation/Number of observations).
Now put the values;
65 + 72 + 60 + 70 + 68/5 = 67.
Thanks all.
Using formula,
Average = (sum of observation/Number of observations).
Now put the values;
65 + 72 + 60 + 70 + 68/5 = 67.
Thanks all.
(194)
Minu said:
7 years ago
You can also average all 5 numbers:
60+72+68+65+70 = 335,
335/5 = 67kgs.
60+72+68+65+70 = 335,
335/5 = 67kgs.
(26)
Ajith Antony George said:
5 years ago
In this question ,
Arun => 65 < x < 72.
Arun's brother => 60 < x < 70.
Arun's mother => x <= 68.
So,
Let me ask you guys,
The weight should be greater than 65 and less than or equal to 68
Since weight can be 65.00000....001 to 68
How can we predict the average weight as 67?
Weight can take decimal values also right?
Data Inadequate isn't it?
Arun => 65 < x < 72.
Arun's brother => 60 < x < 70.
Arun's mother => x <= 68.
So,
Let me ask you guys,
The weight should be greater than 65 and less than or equal to 68
Since weight can be 65.00000....001 to 68
How can we predict the average weight as 67?
Weight can take decimal values also right?
Data Inadequate isn't it?
(17)
Shubham j said:
7 years ago
Arun's statement : (65+72)/2 = 68,
Arun's brother statement : (60+70)/2 = 65,
his mother statement : 68.
Now (68+65+68)/3 = 67.
Arun's brother statement : (60+70)/2 = 65,
his mother statement : 68.
Now (68+65+68)/3 = 67.
(12)
Jasmine said:
1 decade ago
@Sakshi
As arun 65 to 72 so lets take 65,66,67,68,69,70,71 then as arun's brother 60 to 70 so delete 70,71 from the list then according to arun's mom surly less than or equal to 68 so delete 69 and 70 from list so finally lets take 66,67,68 k.. simple...
As arun 65 to 72 so lets take 65,66,67,68,69,70,71 then as arun's brother 60 to 70 so delete 70,71 from the list then according to arun's mom surly less than or equal to 68 so delete 69 and 70 from list so finally lets take 66,67,68 k.. simple...
(8)
Aashi said:
2 years ago
Best explanation Thanks @ANUKA.
(6)
Kranthi said:
3 years ago
@Jasmine
You explained the answer very well. Thank you.
You explained the answer very well. Thank you.
(4)
Avik said:
6 years ago
Why not to take 66,65 and 68?
(4)
Rashmi said:
6 years ago
3 years ago the average age of 3 members is 27 but the present age of 3 members is 30 so 30*3=90.
Avg age of 2 members 5yrs ago 20 years present age is 25 so 25*2 =50 then 90-50=40.
Avg age of 2 members 5yrs ago 20 years present age is 25 so 25*2 =50 then 90-50=40.
(4)
Pankaj said:
7 years ago
Avg of least and most value is 60 + 72/2 = 66.
Her mother said not greater than 68.
So, Avg of 66 + 67 + 68/3 = 67.
Her mother said not greater than 68.
So, Avg of 66 + 67 + 68/3 = 67.
(4)
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