Multiple choice

In what ratio a mixture containing 20% milk should be mixed with another mixture containing 75% milk so that in the resultant mixture percentage of milk becomes 40%. किस अनुपात में 20% दूध वाले मिश्रण को 75% दूध वाले दूसरे मिश्रण के साथ मिलाया जाना चाहिए ताकि परिणामी मिश्रण में दूध का प्रतिशत 40% हो जाए।

  1. 7 : 4

  2. 6 : 5

  3. 9 : 5

  4. 8 : 5

  5. None of these इनमें से कोई नहीं
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Use allegation method. Let ratio = x:y where x is 20% milk and y is 75% milk. Mean is 40%. Using allegation: x : y = (75 - 40) : (40 - 20) = 35 : 20 = 7 : 4. So 20% mixture : 75% mixture = 7 : 4. Correct answer is option A.

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