>>1168332>>1168344No, because it's twice as likely that she chose the box with two meat buns.
Either she took the first meat bun from the box with two meat buns, or she took the second meat bun from the box with two meat buns, or she took the meat bun from the box with one of each. In the first two cases, the next one she takes will be another meat bun, but in the third case, it will be a natto bun.