Aptitude - Alligation or Mixture - Discussion
Discussion Forum : Alligation or Mixture - General Questions (Q.No. 6)
6.
A dishonest milkman professes to sell his milk at cost price but he mixes it with water and thereby gains 25%. The percentage of water in the mixture is:
4%
6
%
%20%
25%
Answer: Option
Explanation:
Let C.P. of 1 litre milk be Re. 1
Then, S.P. of 1 litre of mixture = Re. 1, Gain = 25%.
| C.P. of 1 litre mixture = Re. |  |
100 | x 1 |  |
= | 4 |
| 125 | 5 |
By the rule of alligation, we have:
| C.P. of 1 litre of milk C.P. of 1 litre of water | |||||
| Re. 1 | Mean Price
| 0 | |||
|
|
||||
 Ratio of milk to water = |
4 | : | 1 | = 4 : 1. |
| 5 | 5 |
| Hence, percentage of water in the mixture = | |
1 | x 100 | % |
= 20%. |
| 5 |
Discussion:
65 comments Page 4 of 7.
Roose said:
1 decade ago
I saw the important formula section but I'm still unable to understand the use of rule of allegation.
In every problem I come across I find it used in a diff manner.
Can someone explain it?
In every problem I come across I find it used in a diff manner.
Can someone explain it?
Neela satya sai said:
4 years ago
@Rahul.
Excellent explanation. Thanks.
Excellent explanation. Thanks.
Vikas Rawat said:
1 decade ago
let assume milk to be 100..
After mixing water he gets profit of 25 i.e. he sell mixture (water+milk) at 125..
now percentage of water in full mixture is 25/125*100= 20%
After mixing water he gets profit of 25 i.e. he sell mixture (water+milk) at 125..
now percentage of water in full mixture is 25/125*100= 20%
Teena said:
1 decade ago
What is rule of alligation?
Swati said:
1 decade ago
Explain whole Question once again.
Neetu said:
1 decade ago
Then how we take 1/5 if we do 4/1= its become 4/5(4.. second become by 4+1=5) whay u take 1/5 plz explain me
Amir said:
1 decade ago
@amir:
"milk:water==100:x"
where x is gain%
Soln:
m:w==100:25==4:1
that means water percentage is=
1/5*100=20%
answer==20
"milk:water==100:x"
where x is gain%
Soln:
m:w==100:25==4:1
that means water percentage is=
1/5*100=20%
answer==20
Moncy said:
1 decade ago
@ Pankaj:
Its a formula for finding the C.P when the gain % is given.C.P=((100/(100+gain%))+selling price)
Its a formula for finding the C.P when the gain % is given.C.P=((100/(100+gain%))+selling price)
Pankaj said:
1 decade ago
From where 100/125 is come ?
plz tell soon
plz tell soon
Srinithi said:
9 years ago
I couldn't get how a mean price which is less than cp of milk will give 25%gain?
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