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 5 of 7.
Krishnapriya said:
2 months ago
@All.
Here is the shortest method.
Profit is 25%= 1/4.
So, the ratio of water and milk is 1:4.
So % of water 1/5 = 20%.
Here is the shortest method.
Profit is 25%= 1/4.
So, the ratio of water and milk is 1:4.
So % of water 1/5 = 20%.
(4)
Shubham Tiwari said:
9 years ago
Let C.P = 100.
100 ---> 25%gain ----> 125 ------> 100.
So percentage of water in mixture: (125-100)/125 = 20%.
100 ---> 25%gain ----> 125 ------> 100.
So percentage of water in mixture: (125-100)/125 = 20%.
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
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)
Mashiur said:
5 years ago
Let, CP=SP = x
CP of Milk(M) = Mx
SP of Milk & Water(M+W) = (M+W)x,
Now, (M+W)x-Mx = Mx/4,
M:W = 4:1.
CP of Milk(M) = Mx
SP of Milk & Water(M+W) = (M+W)x,
Now, (M+W)x-Mx = Mx/4,
M:W = 4:1.
(4)
Reisang Kasar said:
8 years ago
Please someone help me.
How to find out the weight of the water mixed in gm per kilogram of milk?
How to find out the weight of the water mixed in gm per kilogram of milk?
Mamta said:
8 years ago
I will not able to understand that please give me easy example's to understand.
Please, help me.
Please, help me.
Nisha said:
6 years ago
25 %= 1/4,
So 4 is milk and 1 is water,
4+1 =5 is milk and water.
1/5 * 100 = 20%.
So 4 is milk and 1 is water,
4+1 =5 is milk and water.
1/5 * 100 = 20%.
(3)
Akki said:
3 years ago
Milk. +. Water. = Total mixture.
100% + 25%. = 125%.
25%/ 125% = 1/5 = 20%.
100% + 25%. = 125%.
25%/ 125% = 1/5 = 20%.
(67)
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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