Question : The ratio in which the Darjeeling tea at 32 per kg is mixed with the Assam tea at 25 per kg to gain 20% by selling the mixture at 32.40 per kg is:
Option 1: 4 : 3
Option 2: 3 : 4
Option 3: 5 : 2
Option 4: 2 : 5
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Correct Answer: 2 : 5
Solution : Let the CP of the tea be Rs $x$ per kg. After getting 20% profit, we get $\frac{120x}{100}=32.4$ ⇒ $x = 27$ Using the method of alligation: Darjeeling tea : Assam tea = 2 : 5 Hence, the correct answer is 2 : 5.
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