Quantitative Aptitude – Arithmetic – Profit and Loss – On selling a pen at 5% loss and a book at 15% gain
Slot – 1 – Quantitative Aptitude – Arithmetic – Profit and Loss – On selling a pen at 5% loss and a book at 15% gain
On selling a pen at 5% loss and a book at 15% gain – Video
Q. On selling a pen at 5% loss and a book at 15% gain, Karim gains Rs. 7. If he sells the pen at 5% gain and the book at 10% gain, he gains Rs. 13. What is the cost price of the book in Rupees?
95
100
80
85
Answer: 80
Solution:
let the CP of pen = p and that of book = b
So as per question 0.15 b – 0.05 p = 7
Or 15b – 5p = 700 ————-1)
Similarly 10b + 5p = 1300 —–2)
Adding both equations 25b = 2000
Or b = 2000/25 = 80
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