तीन संख्याओं का माध्य 15 है। इन आकड़ों के समुच्चय का परास 8 है जबकि दो सबसे न्यूनतम संख्याओं का अंतर 1 है। इन तीनों में सबसे बड़ी संख्या क्या है?

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  2. 20
  3. 24
  4. 22

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Option 2 : 20
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दिया गया है:

तीन संख्याओं का माध्य 15 है।

इन आंकड़ों के समुच्चय का परास 8 है जबकि दो न्यूनतम संख्याओं का अंतर 1 है।

प्रयुक्त अवधारणा:

1. माध्य = प्रेक्षणों का योग ÷ प्रेक्षणों की संख्या

2. परास = उच्चतम प्रेक्षण - निम्नतम प्रेक्षण

गणना:

माना संख्याएँ P, Q और R (आरोही क्रम में) हैं

प्रश्नानुसार,

R - P = 8

⇒ R = 8 + P      ....(1)

Q - P = 1

⇒ Q = P + 1      ....(2)

(P + Q + R) = 15 × 3

⇒ P + (P + 1) + (8 + P) = 45 (समीकरण 1, और 2 से)

⇒ 3P + 9 = 45

⇒ P = 12

इसलिए, R = 8 + 12 = 20

∴ तीन संख्याओं में सबसे बड़ी संख्या 20 है।

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