In what ratio a grocer mix two varieties of tea worth Rs 60 per kg and Rs 65 per kg so that by

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MIXTURE AND ALLIGATION
In what ratio a grocer mix two varieties of tea worth Rs. 60 per kg and Rs. 65 per kg so that by selling mixture at Rs. 68.20 per kg he may gain 10%?
a) 3:2 b) 3:4 c) 3:5 d) 4:5
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Mam is there any other method than allegation method? Can't understand the concept

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