Realated Questions
If 1/2 of the number of white mice in a certain laboratory is 1/8 of the total number of mice, and 1/3 of the number of gray mice is 1/9 of the total number of mice, then what is the ratio of white mice to gray mice in the laboratory?
A lump of two metals weighing 18 g is worth Rs. 87. If their weights be interchanged, it would be worth Rs. 78.60. If the price of one metal is Rs. 6.70 per gram, find the weight of the other metal in the mixture.

A tea trader mixed two varieties of tea, one costing Rs. 3.50 per kilogram, and the costing Rs. 4 per kilogram, and sells 40 kg of the mixture to a vendor at Rs. 4.50 per kilogram, and makes a profit of 20%. How much of each variety did the vendor mix?