A shopkeeper offers a discount of 22% on the marked price of each chair, and gives 13 chairs to a customer for the discounted price of 12 chairs to earn a profit of 26% on the transaction. If the cost price of each chair is Rs 100, then the marked price, in rupees, of each chair is

Cost price of each chair = 100

For 13 chairs, total cost = $$13 \times 100 = 1300$$

Profit = 26%, so total revenue

$$ 1.26 \times 1300 = 1638$$

We were told that this amount is equal to the discounted price of 12 chairs. So the discounted selling price per chair = $$\text{SP}_{\text{disc}} = \frac{1638}{12} = 136.5$$

Discount offered = 22%, so:

MP = $$\frac{136.5}{0.78}$$ = 175