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You have reached Utopia where you find two kinds of precious stones rubies and emeralds. The worth of a ruby and that of an emerald are Rs. 4 crores and Rs. 5 crores respectively while their weights are 0.3 kg and 0.4 kg respectively. You have a bag that can carry a maximum of 12 kgs. How many rubies and emeralds would you carry such that their total value is maximised?