In what ratio should two varieties of tea at Rs. 60 per kg and Rs.120 per kg be mixed together so that by selling the mixture at Rs.96 per kg, a profit of Rs.20% is obtained?

Let us first calculate the cost of the price of the mixture. The selling price of the mixture is given as Rs.96 and the profit is given as 20%. So, Cost price = 100/120×96 = Rs. 80 Now, let us apply allegation method = 40 : 20 = 2 : 1