Multiple choice

Each of given questions consists of a question followed by informations in four statements. You have to study the question and the statements and decide that information in which of the statement(s) is/are necessary to answer the question. Find ratio of milk and water in the resultant I. two mixtures contain milk and water in the ratio 3:2 and 4:3 II. 20 litres from 1st container is taken out and x litres from 2nd is taken out and poured in third container III. value of x is 40 litres IV. the mixture from two containers are mixed in the ratio 3:2

  1. I,II and III

  2. I and IV

  3. I,II and III or I and IV

  4. All required

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

To find the milk:water ratio in the resultant mixture, we need either (I, II, III) OR just (I, IV). With I and IV: mixtures 3:2 and 4:3 combined in 3:2 ratio gives (3/5)(3/5)+(4/7)(2/5) for milk = 9/25+8/35 = (63+40)/175 = 103/175, so water = 72/175. With I, II, III: 20L from first and 40L from second, we can calculate the combined ratio. Either approach works.

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