InclusiveB-meson decays into charm

We have measured the B-meson decay fractions into D⁰, D⁺, and D*+ mesons to be 0.39±{}0.05±{}0.04, 0.17±{}0.04±{}0.04, and 0.22±{}0.04_-0.04+0.07, respectively, if we use the D⁰{→}K^-{{π}}⁺$ and ${D}⁺→{K}^{{{-}}}π⁺{{π}}⁺$ branching ratios determined by the Mark III Collaboration. These results suggest that B decay to noncharm final states is substantial. We also find that B decay to spin-1 ${D}*$ mesons dominates over direct decay to spin-0 D mesons and that the ratio (${D}⁰$+${D}*0$)/(${D}⁺$+${D}*+$) is consistent with unity.