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Answer with Explanation:
Let investment in 12% stock be Rs. x.
Then, investment in 15% stock = Rs. (12000 - x).
Therefore,12/120 x x + 15/125 x (12000 - x) = 1360.
=> x/10 + 3/25 (12000 - x) = 1360.
=> 5x + 72000 - 6x = 1360 x 50
=> x = 4000.
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