Đáp án đúng: C
60% và 40%.
${{M}_{{{C}_{n}}{{H}_{2n+2}}}}\,=\,49,6\,gam\,\Rightarrow \,14n\,+\,2\,=\,49,6\,\Rightarrow \,n\,=\,3,4\,\Rightarrow \,{{C}_{3}}{{H}_{8}};\,{{C}_{4}}{{H}_{10}}$
$\left\{ \begin{array}{l}{{n}_{{{C}_{3}}{{H}_{8}}}}\,+\,{{n}_{{{C}_{4}}{{H}_{10}}}}\,=\,1\\44{{n}_{{{C}_{3}}{{H}_{8}}}}\,+\,58{{n}_{{{C}_{4}}{{H}_{10}}}}\,=\,49,6\end{array} \right.\,\Rightarrow \,\left\{ \begin{array}{l}{{n}_{{{C}_{3}}{{H}_{8}}}}\,=\,0,6\,=\,60{\scriptstyle{}^{o}\!\!\diagup\!\!{}_{o}\;}\\{{n}_{{{C}_{4}}{{H}_{10}}}}\,=\,0,4\,{\scriptstyle{}^{o}\!\!\diagup\!\!{}_{o}\;}\end{array} \right.$
