Question

Two jars of whisky with 25% and 40% concentration of alcohol respectively are mixed. In what proportion should the two types be mixed, so as to get 35% concentration of alcohol in the resulting mixture?
3:4
7:5
9:11
1:2

Answer 1

Answer:

1:2

Step-by-step explanation:

by mixture and alligation method

25 40

35 (40~35 25~35)

5 10

5:10=1:2

Answer 2

Answer:

Concentration of alcohol- 1st Jar : Concentration of alcohol- 2nd Jar = 1:2

Step-by-step explanation:

Let the ratio be x:y for Concentration of alcohol- 1st Jar : Concentration of alcohol- 2nd Jar

By rule of aggregation,

Concentration of alcohol- 1st Jar     Concentration of alcohol-2nd Jar

          25%                                                         40%

                                           

                                                mean- 35%

   

    x=    40-35 = 5                                         y=       35-25 = 10

So, the ratio is 5:10 = 1:2