56. In the class, 12 subjects are studied. In how many ways can 5 different subjects be scheduled for Monday?
56. For the first lesson, the subject can be chosen in twelve ways, for the second - only eleven, and so on. Thus, using the multiplication rule, we get that a schedule of five different subjects, if there are 12 subjects in total, can be created $12 \cdot 11 \cdot 10 \cdot 9 \cdot 8=9504$ ways.