రూ.150లో, B రూ.8కి 10 పెన్నులు, రూ.5కు 10 ఎరేజర్లు, రూ.4కు కొన్ని షార్ప్నర్లను కొనుగోలు చేస్తాడు. ప్రతి వస్తువు యొక్క సగటు ధర ₹లో ఎంత?

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  1. 8
  2. 7
  3. 10
  4. 6

Answer (Detailed Solution Below)

Option 4 : 6
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ఇచ్చింది:

B 10 పెన్నులను ఒక్కొక్కటి ₹ 8కు కొనుగోలు చేస్తాడు.

రూ.5 చొప్పున 10 ఎరేజర్లు.

ఒక్కోదానికి రూ.4 చొప్పున కొన్ని షార్పెనర్లు.

ఉపయోగించిన ఫార్ములా:

సగటు = అన్ని పరిశీలనల మొత్తం/పరిశీలనల సంఖ్య

గణన:

⇒ 150 = 10 × 8 + 10 × 5 + 4 × x

⇒ 150 = 80 + 50 + 4x

⇒ 4x = 20

⇒ x = 5

సగటు = 150/(5 + 10 + 10) = 150/25 = 30/5 = 6

సరైన సమాధానం 6.

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