If the cost price of 15 books is equal to the selling price of 20 books, the…
2019
If the cost price of 15 books is equal to the selling price of 20 books, the loss percent is:
- A.
16%
- B.
20%
- C.
24%
- D.
25%
- E.
33⅓%
Attempted by 32 students.
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Correct answer: D
Let the cost price (CP) of 1 book be x. Then, the cost price of 15 books is 15x.
Given that the selling price (SP) of 20 books is equal to the cost price of 15 books, so SP of 20 books = 15x.
Therefore, SP of 1 book = 15x / 20 = 0.75x.
Loss per book = CP - SP = x - 0.75x = 0.25x.
Loss percentage = (Loss / CP) × 100 = (0.25x / x) × 100 = 25%.
हिन्दी उत्तर: माना 1 किताब का क्रयमूल्य x है। तब 15 किताबों का क्रयमूल्य 15x होगा।
दिया गया है कि 20 किताबों का विक्रयमूल्य 15 किताबों के क्रयमूल्य के बराबर है, अतः 20 किताबों का विक्रयमूल्य = 15x।
इसलिए, 1 किताब का विक्रयमूल्य = 15x / 20 = 0.75x।
प्रति किताब हानि = क्रयमूल्य - विक्रयमूल्य = x - 0.75x = 0.25x।
हानि प्रतिशत = (हानि / क्रयमूल्य) × 100 = (0.25x / x) × 100 = 25%।