Ravi sold a pen at 5% profit and a pencil at 10% profit. In the whole transaction he earns a profit of ₹13. If he sold the pen at 5% loss and the pencil at 15% profit he got ₹ 7 as a profit. Find cost price of one pen.
Answer & explanation
Correct answer: option 1
Let cost price of pen = x & Pencil = y
x × \(\frac{5}{100}\) + y × \(\frac{10}{100}\) = 13
5x + 10y = 1300 ----- (i)
-5x + 15y = 700 ----- (ii) (ATQ)
-----------------------
25y = 2000
y = 80
5x + 800 = 1300
x = 100