1.

The cost of 30 books is Rs. 150. If more than 50 books are purchased, then a discount of 10% is given. How much will 70 books cost?1. Rs. 3002. Rs. 3153. Rs. 3504. Rs. 335

Answer» Correct Answer - Option 2 : Rs. 315

Given: 

The cost of 30 books is Rs. 150

Concept: 

SP = [MP - (MP × Discount%)]

Calculation: 

According to the question

The cost of 30 books is 150 rupees, then

The cost of one book is 

⇒ 150/30

⇒ 5 rupees

The cost of 70 books is 

⇒ 70 × 5

⇒ 350 rupees

Now, 

The cost of 70 books after getting a 10% discount is 

⇒ [350 - (350 × 10%)]

⇒ 350 - 35

⇒ 315 rupees

∴ The cost of 70 books is 315 rupees.



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