In a bag containing red, green and blue pens, the ratio of red, blue and green pens, in the given order, was 7 ∶ 4 ∶ 9. If the total number of pens in the bag was 320, how many of them were red?

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SSC CGL 2023 Tier-I Official Paper (Held On: 17 Jul 2023 Shift 2)
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  1. 112
  2. 105
  3. 119
  4. 126

Answer (Detailed Solution Below)

Option 1 : 112
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Detailed Solution

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Given:

Red pens : blue pens : green pens = 7 : 4 : 9

Total number of pens = 320

Calculation:

Red pens : blue pens : green pens = 7 : 4 : 9

⇒ 20 units = 320 pens

⇒ 1 unit = 16 pen

Red pen = 7 units = 16 × 7 = 112 pens

∴ The correct answer is 112 pens.

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