From statement I, II, and III:
The cost price of two oven = Rs.4000 each
Let the selling price of two ovens be 24a and 25a respectively.
Difference between the profits = Rs. 200
Solving,
(25a – 4000) – (24a – 4000) = 200
⇒ a = 200
Selling price of one oven = 25 × 200 = Rs. 5000
Selling price of other oven = 24 × 200 = Rs. 4800
⇒ Total selling price = 5000 + 4800 = Rs. 9800
Total cost price = Rs. 8000
⇒ Required profit percentage =
× 100 = 22.5%
∴ Using all three statements we can answer the question.