How many kilograms of sugar at Rs. 3.80 per kg should be mixed with 60 kgs of sugar at Rs. 4.60 per kg, so that by selling the mixture at Rs. 5 per kg, there may be gain of 25%?

Correct option is B

Given:

Price of first sugar = Rs. 3.80/kg

Quantity of second sugar = 60 kg

Price of second sugar = Rs. 4.60/kg

Selling price of mixture = Rs. 5/kg

Gain = 25%

Formula Used:

C.P. = $$\frac{\text{S.P.}}{1 + \frac{\text{Gain\%}}{100}}$$​​

Solution: 

Required CP = $$\frac{5}{1.25} = 4$$​

Using allegation:

Ratio of price is in proportion with their weight.

​$$\frac{3}{1} = \frac{X}{60} \\ \ \\ \implies X = 180 \ kg$$​​