In what proportion must wheat at price Rs. 4.10 per kg must be mixed with wheat at price Rs. 4.60 per kg, so that the mixture be worth Rs. 4.30 a kg? 

Let a kgs of wheat at price Rs. 4.10 per kg is mixed with b kgs of  wheat at price Rs. 4.60 per kg is mixed 

total weight of wheaat= a+b price of the total quantity=4.3 per kg

$a\left(4.10\right)+b\left(4.6\right)=\left(a+b\right)4.3$

$$\begin{gathered} \Rightarrow 0.3b=0.2a \\ \therefore \frac{a}{b}=\frac{3}{2} \end{gathered}$$