A farmer harvested b bags of beans and sold each bag for Ksh. X. He also harvested m bags of maize and sold each bag for Ksh. Y. Form an algebraic expression for the total amount of money the farmer r

The farmer harvested $b$ bags of beans.
Each bag of beans was sold for $Ksh. X$.
The total amount from selling beans is the number of bags multiplied by the price per bag.

$$\text{Amount from beans} = b \times X = bX$$

The farmer harvested $m$ bags of maize.
Each bag of maize was sold for $Ksh. Y$.
The total amount from selling maize is the number of bags multiplied by the price per bag.

$$\text{Amount from maize} = m \times Y = mY$$

The total amount of money received is the sum of the amount from selling beans and the amount from selling maize.

$$\text{Total amount} = \text{Amount from beans} + \text{Amount from maize}$$ $$\text{Total amount} = bX + mY$$

The algebraic expression for the total amount of money received from the sales is $\boxed{Ksh. (bX + mY)}$.