6, 8, x + 2, 10, 2x - 1, और 2 का माध्य 9 है। x ज्ञात कीजिए।

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DFCCIL Executive CBT1 Civil 25 Aug 2023 Shift 3 Official Paper
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  1. 7
  2. 11
  3. 7.5
  4. 9

Answer (Detailed Solution Below)

Option 4 : 9
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दिया गया है:

संख्याएँ: 6, 8, x + 2, 10, 2x - 1, 2

संख्याओं का माध्य = 9

प्रयुक्त सूत्र:

माध्य = (सभी संख्याओं का योग) / (संख्याओं की संख्या)

गणना:

संख्याओं का योग = 6 + 8 + (x + 2) + 10 + (2x - 1) + 2

संख्याओं की संख्या = 6

माध्य = 9

मानों को सूत्र में प्रतिस्थापित कीजिए:

⇒ 6 + 8 + x + 2 + 10 + 2x - 1 + 2 = 54

⇒ 3x + 27 = 54

⇒ 3x = 54 - 27

⇒ 3x = 27

⇒ x = 27 / 3

⇒ x = 9

x का मान 9 है।

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