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 4 of 6.
Rajeshwari said:
9 years ago
Thank you @Sathiya.
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.
Vasan said:
9 years ago
@Venu, explained very well.
Muneer said:
10 years ago
Can anyone explain in a simple way?
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.
Venu said:
1 decade ago
Guys,
If the given numbers are in A.P and no. of. numbers is odd number, then average of the whole is just the middle term or the average of first and last numbers.
E.g:- Average of 66, 67 and 68 is 67 only.
No need to do 66+67+68/3.
Use above formula and quickly answer it.
If the given numbers are in A.P and no. of. numbers is odd number, then average of the whole is just the middle term or the average of first and last numbers.
E.g:- Average of 66, 67 and 68 is 67 only.
No need to do 66+67+68/3.
Use above formula and quickly answer it.
Harsha said:
1 decade ago
From the question itself. We are going to know that the age is in between 65-68.
So 66, 67, 68.
Why 66.....because. It should be greater than 65 as @Arun said Why 67....because as per his brother opinion <60 & >70.
As per his mother his age is definitely 68. So eliminate 69, 70 so according to his brother. His age is 67....why 68..... his mother gave a statement that he is 68 years old.
So 66, 67, 68.
Why 66.....because. It should be greater than 65 as @Arun said Why 67....because as per his brother opinion <60 & >70.
As per his mother his age is definitely 68. So eliminate 69, 70 so according to his brother. His age is 67....why 68..... his mother gave a statement that he is 68 years old.
Abhishek said:
1 decade ago
Actually they want probable Weight or we can say avg weight.
So the simplest way to solve this Question is like that.
All the weights are Greater than or less than each other so easily we can find out their avg like.
65+72+60+70+68=335/5.
Answer will be 67 kgs.
So the simplest way to solve this Question is like that.
All the weights are Greater than or less than each other so easily we can find out their avg like.
65+72+60+70+68=335/5.
Answer will be 67 kgs.
Myvizhimalar said:
1 decade ago
In The Given Problem, they said that Arun assume that his age will be more than 65 and less than 70,
A--> 65<A<75.
His brother's, 60< A < 70.
His Mom's opinion is, A<=68.
So the common numbers by the above three conditions are 66, 67, 68
by(66+67+68)/3 = 201/3 = 67kg.
A--> 65<A<75.
His brother's, 60< A < 70.
His Mom's opinion is, A<=68.
So the common numbers by the above three conditions are 66, 67, 68
by(66+67+68)/3 = 201/3 = 67kg.
Rituraj said:
1 decade ago
Why aren't we assuming fractional values?
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