Question

cost of 6 oranges is rupees 50. the vendors sells them for rupees 80. he earns the profit of .answer give me with solution​

Answer 1

profit is 30 rupees. he earned 30 rupees more than he bought them with. I subtracted the cost price with the selling price to get the difference, which is the extra money,also the profit he gets.

By the way, this will be the solution if you are asking for his profit. The question is a bit not precise, so I assume you are asking for the whole profit he is earning.