7.Naman sold 6 dozen pens for 225 and suffered a loss 0.05 per pen. At...
Solution
To solve this problem, we need to use the concept of cost price, selling price, and profit/loss.
Step 1: Calculate the selling price of 1 pen
Naman sold 6 dozen pens, which means he sold a total of 6 x 12 = 72 pens.
Selling price of 72 pens = Rs. 225
Selling price of 1 pen = 225/72 = 3.125
Step 2: Calculate the cost price of 1 pen
Naman suffered a loss of 0.05 per pen, which means his selling price was 0.05 less than his cost price.
Let the cost price of 1 pen be Rs. x.
Selling price of 1 pen = Cost price of 1 pen - Loss per pen
3.125 = x - 0.05x
3.125 = 0.95x
x = 3.125/0.95
x = 3.29
Therefore, the cost price of 1 pen is Rs. 3.29.
Conclusion
Naman bought the pens at a cost price of Rs. 3.29 per pen and sold them at a selling price of Rs. 3.125 per pen, which resulted in a loss of 0.05 per pen.