Wairimu beans cost Ksh. 4,000 per bag and Yellow Green beans cost Ksh. 3,500 per bag. Find the ratio a:b such that the cost of the mixture is Ksh. 3,835 per bag.

Step 1: Understand the problem and define variables. Let the cost of Wairimu beans be C_W = Ksh. 4,000 per bag. Let the cost of Yellow Green beans be C_YG = Ksh. 3,500 per bag. a) Find the ratio a:b such that the cost of the mixture is Ksh. 3,835 per bag. Let a be the number of bags of Wairimu and b be the number of bags of Yellow Green. The total cost of the mixture is a × C_W + b × C_YG. The total number of bags is $