Alfred buys an old scooter for Rs. 4700 and spends Rs. 800 on its repairs. If he sells the scooter for Rs. 5800, his gain percent is:
 

2. 
The cost price of 20 articles is the same as the selling price of x articles. If the profit is 25%, then the value of x is:
 

3. 
If selling price is doubled, the profit triples. Find the profit percent.
 

4. 
In a certain store, the profit is 320% of the cost. If the cost increases by 25% but the selling price remains constant, approximately what percentage of the selling price is the profit?
 

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