If the cost price of 15 books is equal to the selling price of 20 books, then the loss percent is :यदि 15 पुस्तकों के क्रय मूल्य, 20 पुस्तकों के विक्रय मूल्य के बराबर हो, तो हानि प्रतिशत है :

1. A20%
2. B25%
3. C30%
4. D33⅓%

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Correct answer: B. 25%

Explanation

Let the cost price of 15 books = selling price of 20 books = ₹60. Then CP of one book = ₹4 and SP of one book = ₹3, so the loss is ₹1 on a CP of ₹4. Loss % = 1/4 × 100 = 25%.माना 15 पुस्तकों का क्रय मूल्य = 20 पुस्तकों का विक्रय मूल्य = ₹60। तब एक पुस्तक का क्रय मूल्य = ₹4 तथा विक्रय मूल्य = ₹3, अतः ₹4 पर हानि ₹1। हानि % = 1/4 × 100 = 25%।