C-11-Q071mediumsingle_mcqThe sum rule equality a+c+e+gb+d+f+h=k\dfrac{a+c+e+g}{b+d+f+h} = kb+d+f+ha+c+e+g=k requires—ab+d+f+h≠0b+d+f+h \ne 0b+d+f+h=0b