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 2 of 6.
NitishPandey said:
8 years ago
@Anwi.
Son and father average age =11x+5x in linear sequence 11x is father and 5x is son,
11x+5x=40 so,
(11x+5x)=40 * 2 because here only possibility of two person father and son,
16x=80,
x=5.
Then son age = 5 * 5
So ans 25,
Hope you understand.
Son and father average age =11x+5x in linear sequence 11x is father and 5x is son,
11x+5x=40 so,
(11x+5x)=40 * 2 because here only possibility of two person father and son,
16x=80,
x=5.
Then son age = 5 * 5
So ans 25,
Hope you understand.
Prateek bhaiya said:
9 years ago
Acccording to me,
Given condition : x > 65 & amp; x < 72(according to Arun opinion).
x > 60 & x < 70(according to Arun's brother).
x < = 68(according to Arun's mother).
So, average age = 65 + 72 + 60 + 70 + 68/5.
335/7 = 67.
Ans is 67.
Given condition : x > 65 & amp; x < 72(according to Arun opinion).
x > 60 & x < 70(according to Arun's brother).
x < = 68(according to Arun's mother).
So, average age = 65 + 72 + 60 + 70 + 68/5.
335/7 = 67.
Ans is 67.
Hemanth Kothuru said:
10 years ago
Weight can also be non integer so given answer is definitely wrong. So the possible way considering all of them are correct is 65<w<68.
So minimum weight is 65+x (x is very very small) and maximum weight is 68. So therefore average weight is 66.5.
So minimum weight is 65+x (x is very very small) and maximum weight is 68. So therefore average weight is 66.5.
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)
Yazdani said:
7 years ago
Arun's opinion between 65 to 72 kg.
So avg of Arun's opinion= 66+67+68+69+70+71÷ 6 = 68.5 --> 1
Aruns bro opinion btwetween 60 to 70kg.
Avg =61+62+63+64+65+66+69 ÷ 7 = 65 --> 2.
Arun's opinion is 68 --> 3.
Take the avg of eq 1,2,3.
We get 67.
So avg of Arun's opinion= 66+67+68+69+70+71÷ 6 = 68.5 --> 1
Aruns bro opinion btwetween 60 to 70kg.
Avg =61+62+63+64+65+66+69 ÷ 7 = 65 --> 2.
Arun's opinion is 68 --> 3.
Take the avg of eq 1,2,3.
We get 67.
Ashwini madne said:
9 years ago
According to Arun, 65 < X < 72.
[(65 + 72/2) = 68.5 ie 69].
According to Arun's brother, 60 < X < 70.
[(60 + 70/2) = 65].
According to Arun's mother, X <= 68.
Required Average = (69 + 65 + 68)/3.
= 202/3.
= 67.33 i.e 67kg ==> answer.
[(65 + 72/2) = 68.5 ie 69].
According to Arun's brother, 60 < X < 70.
[(60 + 70/2) = 65].
According to Arun's mother, X <= 68.
Required Average = (69 + 65 + 68)/3.
= 202/3.
= 67.33 i.e 67kg ==> answer.
Rohit said:
7 years ago
There was not given any condition to consider weights as integer values.
Why take 66, 67 & 68 only?
Well, If he's greater than 65, And what he thinks is correct. He can weight, for instance, 65.1 or maybe 65.2.
Someone help me out here.
Why take 66, 67 & 68 only?
Well, If he's greater than 65, And what he thinks is correct. He can weight, for instance, 65.1 or maybe 65.2.
Someone help me out here.
Uma said:
1 decade ago
I got ans like tis way..., may i dont know whether is it correct r nt
view of arun avg=(65+72)/2=68.5
view of his brothers avg=(60+70)/2=65
view of his mother taken as=68
Therefore the avg of above three as=(68.5+65+68)/3=67
view of arun avg=(65+72)/2=68.5
view of his brothers avg=(60+70)/2=65
view of his mother taken as=68
Therefore the avg of above three as=(68.5+65+68)/3=67
Vinod said:
1 decade ago
As arun said, his weight is greater than 65 kg, and mother said, his weight cannot be greater than 68 kg.
then value will be 65<=68
It means value is 66,67,68.
then Required average = 66 + 67 + 68 = 201 = 67 kg.
then value will be 65<=68
It means value is 66,67,68.
then Required average = 66 + 67 + 68 = 201 = 67 kg.
Sathiya said:
1 decade ago
Can i explain like this
According to arun 65to72
then he's brother 60to70
He's mother 68
Then 65+72+60+70+68=335
335/5=67
The answer is 67 .
This method right or wrong explain anyone.
According to arun 65to72
then he's brother 60to70
He's mother 68
Then 65+72+60+70+68=335
335/5=67
The answer is 67 .
This method right or wrong explain anyone.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers