Mixtures And Alligations

1.400 gm spirit solution has 30 % spirit in it , what is the ratio of spirit should be added to make it 80 % in the solution ?
A)2:5
B)4:3
C)5:2
D)2:7
A)2:5

2.One alloy contains silver and copper in the ratio 5:1 and the other contains in the ratio 7:2 respectively. What weights of the 2 must be melted together, so as to make a 5 lb mass with 80% silver?
A)5:3
B)3:2
C)2:3
D)2:5
B)3:2


3.Box A contains wheat worth Rs.30 per kg and box B contains wheat worth Rs.40 per kg.If both A and B are mixed in the the ratio 4:7 then the price of mixture per kg is
A)36.36
B)35.80
C)42.50
D)31.30
A)36.36

Mixtures And Alligations

1.Sum of Rs.118 was shared among 50 boys and girls,each girl receive Rs.2.60 and boy receive Rs.1.80.Find the number of girls.
A) 15
B)25
C)30
D)35

D)35


2.A Mixture contain 80% of sulphur,another mixture contain 70% of sulphur.In order to get 84% of sulphur,in what ratio these two must be mixed.
A) 2:7
B)7:2
C)7:4
D)4:5
B)7:2


3.In what ratio water be mixed with juice costing Rs.12 per liter to obtain a mixture worth of Rs.8 per litre?
A)2:3
B)2:1
C)1:2
D)3:2
C)1:2

4.In what proportion must sugar at Price 4.10 per kg must be mixed with weat at Price 4.60 per kg, so that the mixture be worth Rs 4.30 a Kg ?
A)3:2
B)2:3
C)5:3
D)None of these

A)3:2

5.In what proportion must water be mixed with milk to gain 40 % by selling it at cost price ?
A) 3:5
B)5:3
C)2:3
D)3:2
C)2:3   – Solution: cp=1-(40/100)=(100-40)/100
Sol: cp=1-(40/100)=(100-40)/100
=60/100=3/5.Rs
Then required ratio is 2:3