and expenditure of A, B and C are 8y, 9y and 15y respectively \begin{align} & \Rightarrow {\text{ Income of, }} \cr & A \times \frac{1}{4}{\text{ = Saving of A (given)}} \cr & \Rightarrow 7x - 8y = 7x \times \frac{1}{4} \cr & \Rightarrow 28x - 32y = 7x \cr & \Rightarrow 21x = 32y \cr & \Rightarrow x:y = 32:21 \cr\end{align} ∴ The ratio of savings of A, B and C

⇒ (7x - 8y) : (9x - 9y) : (12x : 15y)

⇒ (7 $\times$ 32 - 8 $\times$ 21) : (9 $\times$ 32 - 9 $\times$ 21) : (12 $\times$ 32 - 15 $\times$ 21)

⇒ (224 - 168) : (288 - 189) : (384 - 315) ⇒ 56 : 99 : 69

Then, number of passenger traveling by second class will be 4x.

But the fare is in the ratio 3:1

In other words, if 3y fare is collected per I class passenger, y would be collected per II class passenger.

Fares of I class passengers : Fares of II class passengers

= x*3y : 4x*y

= 3:4 The above ratio can be interpreted as follows.

If total fare is 3+4 = 7, then I class passengers should pay Rs. 3

Similarly, we can calculate the fare of I class passengers when total was 224000

Total Fare I Class Fare

7 3

224000?

= 224000*(3/7) = Rs. 96000.

= 25% of 2 litre

= 0.25*2 = 0.5 litre

Amount of alcohol in second vessel,

= 40% of 6 litre

= 0.4*6 = 2.4 litre

Total amount of alcohol out of 10 litres of mixture is,

0.5+2.4 = 2.9 litre.

Thus, Concentration of the mixture is,

(2.9*100)/10

= 29%.