Question

A merchant bought 12 desks and 20 stools for Rs. 9600. He sold all the desks at a profit of 25% and all the stools at a profit of 15% and earned a profit of Rs. 1800. Find the approximate profit earned if he sold 6 desks and 12 stools for Rs. 7500.

Q: Answer-A merchant bought 12 desks and 20 stools for Rs. 9600. He sold all the desks at a profit of 25% and...

ATQ, Let cost price of 12 desks be Rs. x and cost price of 20 stools be Rs. y. So, x y 9600 And 0.25 x 0.15 y 1800 Or, 0.25 9600 y 0.15y 1800 Or, 0.10y 600 Or, y 6000 So, x 9600 6000 3600 Cost price of a desk 360012 Rs. 300 Cost price of a stool 600020 Rs. 300 Cost price of 6 desks and 12 stools 300 6 300 12 Rs. 5400 Desired Percentage 7500 54005400 100 38.89 or 39