SSC CHSL Similar 21 Nov S1 – Q052

Question:

A shopkeeper purchases a certain number of identical pens at a rate of Rs. 840 per dozen. He sells them at Rs. 75 per piece. Find how many pens he bought if his total profit is Rs. 240.

एक दुकानदार 840 रुपये प्रति दर्जन की दर से कुछ पेन खरीदता है। वह उन्हें 75 रुपये प्रति पेन की दर से बेचता है। यदि उसका कुल लाभ 240 रुपये है, तो ज्ञात कीजिए कि उसने कितने पेन खरीदे।

Options:

  • 12
  • 18
  • 48
  • 30
  • 12
  • 18
  • 48
  • 30

Correct Answer: c)

Explanation:

Cost price of 1 pen = \(\dfrac{840}{12} = \text{Rs. } 70\).
Selling price of 1 pen = Rs. 75.
Profit per pen = \(75 – 70 = \text{Rs. } 5\).
Total profit = Rs. 240.
Number of pens bought = \(\dfrac{240}{5} = 48\text{ pens}\).

1 पेन का क्रय मूल्य = \(\dfrac{840}{12} = 70\text{ रुपये}\)।
1 पेन का विक्रय मूल्य = 75 रुपये।
प्रति पेन लाभ = \(75 – 70 = 5\text{ रुपये}\)।
कुल लाभ = 240 रुपये।
पेनों की संख्या = \(\dfrac{240}{5} = 48\)।

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