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On selling a pen at 5% loss and a book at 15% gain -Quantitative Aptitude – Arithmetic | Profit and Loss |

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The question below is from previous year CAT question from CAT 2019 exam comes from CAT Arithmetic – Profit and Loss – On selling a pen at 5% loss and a book at 15% gain ..

Find out by answering this question which tests an aspirant’s Quantitative Ability Skills:

CAT 2019 – Slot 1 - CAT Profit and Loss - Question 4 - On selling a pen at 5% loss and a book at 15% gain

Q. 4: 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?
1. 95
2. 100
3. 80
4. 85

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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