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How many kilos of tea worth rs. 72 per kg should be mixed with 10kg of tea worth rs. 90 per kg to produce a mixture which will cost rs. 78 per kg




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Let the required number of kilos of tea be x.
⇒According to the problem,
72x+10*90=78(10+x) ....(making the prices equal)
Ans: 20 kilos of tea must be mixed .
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