Determine the number of non-negative integer solutions to the equation x₁ + x₂ + x3 + x4 + X5 + X6 + x7 + x8 C(19,7) C(19,8) C(20,12) C(20,8) None of these. = : 12

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A: Thanks for the question :)And your upvote will be really appreciable ;)

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