A factory buys 7 machines. 2 machine A, 2 Machine B and rest Machine C. Prices of the machines are Rs. 95000, Rs. 75000 and Rs. 43000 respectively. Calculate the average cost of these machines-

$$\eqalign{ & {\text{Given,}} \cr & \therefore {\text{Total cost of the 7 machines}} \cr & = 95000 \times 2 + 75000 \times 2 + 43000 \times 3 \cr & = 190000 + 150000 + 129000 \cr & = {\text{Rs}}{\text{. }}469000 \cr & \because {\text{Average}} = \frac{{{\text{Total cost}}}}{{{\text{Total number of machines}}}} \cr & = \frac{{469000}}{7} \cr & = {\text{Rs}}{\text{. }}67000 \cr} $$