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If a, b, c are determined by throw of a ...

If a, b, c are determined by throw of a single dice thrice, given `a^(2)+b^(2)+c^(2)leab+bc+ca` the probability that a point `(a,b,c)` determined in 3dimensional co-ordinate system lies inside the tetrahedron formed by coordinate planes and `x+y+z=12` is

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