SNAP Average, Ratio, and Proportions Questions

Let amount of alcohol in A = x
Thus, total volume of solution A = x + 3x = 4x
Amount of alcohol in B = 4k
Thus, total volume of solution B = 4k + 5k = 9k
Since, volume of both solutions is equal 4x = 9k (1)
Ratio of alcohol in the final solution = (x + 4k)/(4x + 9k)
On substituting (1) we get ratio of alcohol in the final solution = 25 : 72
Thus, ratio of alcohol and water in the final solution = 25 : 47

Let the weights be 5x and 6x. 5x - 10 : 6x = 2: 3 = > 12x = 15x - 30
So, x = 10. Babu’s weight = 6x = 60 kgs.

Let the ratio = m:n

Let CP of the mixture per kg = k

(1.2)k = SP = 42

k = 42/1.2 = 35/-

32(m)+38(n) = (35)(m+n)

32m+38n = 35m+35n

3m = 3n

m/n = 1

Hence the ratio is m:n = 1:1

So the answer is option C.

The amount paid by Veen and Priya = 2400 - Seema’s share = 2400 - 40% of 2400 = Rs 1440
Thus, the amount paid by Veena = 3/5 x 1440 = Rs 864

The sweetness of glucose = 0.74, the sweetness of lactose = 0.16 The sweetness of Maltose = 0.32

Using alligation, the ratio = $$\ \dfrac{\ 0.32-0.16}{0.74-0.32}$$ = $$\ \dfrac{\ 16}{42}$$ = 8:21

A says that, for an investment of Rs. 75, the return will be 5% on Rs. 10, with a 30% tax. 

So, Total return= $$\ \frac{\ 5}{100\ }\cdot10$$.

After tax deduction, Final Return= $$\ \frac{\ 5}{100\ }\cdot10\cdot\ \frac{\ 70}{100}$$ = 0.35

Percentage return= $$\ \frac{\ 0.35}{75}\cdot100$$= $$\ \frac{\ 35}{75}$$= 0.467%

B says that, for an investment of Rs. 90, the return will be 4% on Rs. 10, tax free.

So, Total return= $$\ \frac{\ 4}{100}\cdot10$$ =0.4

Percentage return for B= $$\ \frac{\ 0.4}{90}\cdot100$$= $$\ \frac{\ 40}{90}$$= 0.444%

Since, Percentage return in case A is greater than that in case B. Therefore, Option B is correct.