If 65% of 350 - ?% of 250 + 40% of 120 = 158, then find the value of ?

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SSC CGL 2023 Tier-I Official Paper (Held On: 19 Jul 2023 Shift 3)
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  1. 57
  2. 63
  3. 47
  4. 54

Answer (Detailed Solution Below)

Option 3 : 47
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Detailed Solution

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Calculation : 

65% of 350 - ?% of 250 + 40% of 120 = 158

⇒ 65/100 × 350 - x/100 × 250 + 40/100 × 120 = 158

⇒ 65/10 × 35 - x/10 × 25 + 48 = 158

⇒ 227.5 - 5x/2 + 48 = 158

⇒ 227.5 - 5x/2 = 110

⇒ 227.5 - 110 = 5x/2

⇒ 117.5 = 5x/2

⇒ 235 = 5x

⇒ x = 47

∴ The correct answer is 47.

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