In the following question, which of the given statement(s) are necessary for determining the answer.
What was the percentage discount offered by the shopkeeper?
I. Profit earned by selling the article for Rs. 432 after giving discount was Rs. 32.
II. Had there been no discount, the profit earned would have been Rs. 80.
III. Had there been no discount, the profit earned would have been 20%
1
I and II Only
2
II and either I or III only
3
I and III Only
4
I and either II or III only.
5
None of these