Let selling price of one hen is SP.
Total Selling price of 144 hens = Rs 144SP
Loss = 6SP
Total Cost Price = Total Sellling PriceP + Loss = 144SP + 6SP = 150SP
Loss percentage = (Toal Loss/Total Cost Price) x 100 = (6SP/150SP) X 100
= 4 %
Now if Cost Price of 144 hens = Rs. 7200.
Selling Price of 144 hens at 4% loss = [1-0.04]xCP = 0.96 CP
= 0.96x7200 = Rs.6912
Hence selling price of one hen = 6912/144 = Rs.48