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In what ratio must a grocer mix two varieties of tea worth Rs 60 a kg and Rs 65 a kg so that by selling the mixture at Rs 68.20 a kg he may gain 10%? `3\ :2` (b) `3\ :4` (c) `3\ :5` (d) `4\ :5`

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RS AGGARWAL-ALLIGATION OR MIXTURE-All Questions
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  2. The cost of Type 1 rice is Rs 15 per kg and Type 2 rice is Rs 20 per k...

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