13. A person bought some articlesat the rate of 5 per rupee andthe sam

1.	13. A person bought some articlesat the rate of 5 per rupee andthe same number at the rate of4 per rupee. He mixed both thetypes and sold at the rate of 9for 2 rupees. In this businesshe suffered a loss of * 3. Thetotal number of articles boughtby him was
Answer» Number of articles person bought be n Total cost price of articlesCP = n/5 + n/4 = 9n/20 Selling price of articles:Person sell 9 articles for Rs 2Person sell 1 article for Rs 2/9 Then, selling price of 2n articles SP = 4n/9 Thus, CP - SP = 39n/20 - 4n/9 = 3(81n - 80n)/ 180 = 3n = 3*180n = 540 Therefore, total number of articles bought = 540

13. A person bought some articlesat the rate of 5 per rupee andthe same number at the rate of4 per rupee. He mixed both thetypes and sold at the rate of 9for 2 rupees. In this businesshe suffered a loss of * 3. Thetotal number of articles boughtby him was

Answer»

Number of articles person bought be n

Total cost price of articlesCP = n/5 + n/4 = 9n/20

Selling price of articles:Person sell 9 articles for Rs 2Person sell 1 article for Rs 2/9

Then, selling price of 2n articles SP = 4n/9

Thus, CP - SP = 39n/20 - 4n/9 = 3(81n - 80n)/ 180 = 3n = 3*180n = 540

Therefore, total number of articles bought = 540