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Solution
Given : $$(x^2 + y^2) = 61$$ and $$xy = -30$$
Using $$(x + y)^2 = x^2 + y^2 + 2xy$$
=> $$(x + y)^2 = 61 + (2 \times -30)$$
=> $$(x + y) = \sqrt{61 - 60} = 1$$
=> Ans - (C)
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