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UPSC 2015 CDS II Math Paper
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© examsnet.com
Question : 3
Total: 100
A milkman claims to sell milk at its cost price only. Still he is making a profit of 20% since he has mixed some amount of water in the milk. What is the percentage of milk in the mixture ?
[2015 CDS-II]
200
3
%
75
%
80
%
TM %
Validate
Solution:
Profit of the milkman
=
20
%
=
1
5
Therefore, Amount of water in the mixture : Amount of milk in the mixture
=
1
:
5
Total amount of the mixture
=
1
+
5
=
6
Therefore, percentage of milk in the mixture
=
Amount of milk in the mixture
Total amount of the mixture
×
100
%
=
5
6
×
100
%
=
250
3
%
© examsnet.com
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