किराने वाले को क्रमश: ₹ 15 / किलो और ₹ 20 / किलो की कीमत वाली दो प्रकार की दालों को किस अनुपात में मिलाना चाहिए ताकि ₹ 16.50 / किलो की कीमत वाली दालों का मिश्रण प्राप्त किया जा सके ?

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  1. 3 ∶ 7
  2. 57
  3. 73
  4. 75

Answer (Detailed Solution Below)

Option 3 : 73
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Detailed Solution

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दिया गया है:

दाल 1 की कीमत = ₹15/किलो

दाल 2 की कीमत = ₹20/किलो 

मिश्रण की कीमत = ₹16.50/किलो 

प्रयुक्त सूत्र:

मिश्रण के नियम का उपयोग करके:

मान लीजिए अनुपात x : y है।

\(( \dfrac{\text{Higher Price} - \text{Mean Price}}{\text{Mean Price} - \text{Lower Price}} )\)

गणना:

\(( \dfrac{20 - 16.50}{16.50 - 15} )\)

\(( \dfrac{3.50}{1.50} )\)

\(( \dfrac{7}{3} )\)

∴ सही उत्तर (7 : 3) है।

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