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5x+10y +15z15x+10y5z+5x10y5z / (5x+10y+15z)(15x+10y5z)+(5x10y5z) a. 1/3 b. 1 c. x+2y+z / x2y+3z d. x2yz / x+2y3z e. x2yz / x+2y+z my answer is none of above, is  1/3, I didn't know I done it wrong or the question is
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