In a box, the ratio of pens to pencils to 7 : 6. If there are 180 pencils, the total number of pens and pencils in the box is:

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CISF Constable Tradesman Official Paper (Held On: 31 Oct, 2023 Shift 2)
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  1. 400
  2. 200
  3. 390
  4. 150

Answer (Detailed Solution Below)

Option 3 : 390
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Detailed Solution

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Given:

Ratio of pens to pencils = 7 : 6

Number of pencils = 180

Formula used:

Let the number of pens be 7x and the number of pencils be 6x

Calculations:

Number of pencils = 6x = 180

⇒ x = \(\dfrac{180}{6}\) = 30

Number of pens = 7x = 7 × 30 = 210

Total number of pens and pencils = 210 + 180 = 390

∴ The correct answer is option (3).

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-> According to the notice, a total number of 1161 Vacancies have been announced for various posts/trade under CISF Tradesman Recruitment 2025.

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-> Candidates who want to score high and crack the exam must go through the CISF Constable Tradesman previous year papers to understand the trend of the questions for the exam.

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