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A bookshop sells books whose marked price is Rs. 300 at a discount of 15% and gives a pamphlet costing Rs. 15 free with each book. Even then he makes a profit of 20%. What is his cost price per book?
1. 200
2. 250
3. 150
4. 220
5. 240

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Correct Answer - Option 1 : 200

Given:

Marked Price = Rs. 300

Discount = 15%

pamphlet price = Rs. 15

Profit = 20%

Formula Used:

S.P = (100 – discount%)/100 × M.P

C.P = [100/(100 + profit%)] × S.P

Calculation:

Marked Price = Rs. 300

∴ Selling Price = {[(85/100) × 300] – 15}

⇒ [(85 × 3) – 15]

⇒ 255 – 15

⇒ Rs. 240

∴ Gain = 20%

∴ C.P = (100/120) × 240

⇒ 100 × 2

⇒ Rs. 200

∴ The Cost price of each book is Rs. 200.

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