24 పరిశీలనల సగటు 41. మొదటి 9 పరిశీలనల సగటు 42. చివరి 16 పరిశీలనల సగటు 39. 9 వ పరిశీలన యొక్క విలువ ఎంత?

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SSC MTS (2022) Official Paper (Held On: 13 Jun, 2023 Shift 1)
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  1. 14
  2. 24
  3. 18
  4. 20

Answer (Detailed Solution Below)

Option 3 : 18
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ఇచ్చింది:

24 పరిశీలనల సగటు 41.

మొదటి 9 పరిశీలనల సగటు 42.

గత 16 పరిశీలనల సగటు 39.

గణన:

మొత్తం 24 పరిశీలనలు,

⇒ 41 × 24 = 984

మొత్తం 9 పరిశీలనలలో మొదటిది,

⇒ 9 × 42 = 378

చివరి 16 పరిశీలనల మొత్తం 

⇒ 16 × 39 = 624

మొత్తం 25 పరిశీలనల మొత్తం,

⇒ 624 + 378 = 1002

9 వ పరిశీలన యొక్క విలువ 

⇒ 1002 - 984 = 18

∴ సరైన ఎంపిక 3

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