Item 1.6.1.c.
\({16 \choose 6} - \left[{7 \choose 1}{13 \choose 6} - {7 \choose 2}{10 \choose 6} + {7 \choose 3}{7 \choose 6}\right]\) meals. Use PIE to subtract all the meals in which you get 3 or more of a particular item.
\({16 \choose 6} - \left[{7 \choose 1}{13 \choose 6} - {7 \choose 2}{10 \choose 6} + {7 \choose 3}{7 \choose 6}\right]\) meals. Use PIE to subtract all the meals in which you get 3 or more of a particular item.