#881 · Combinatorics · Counting
Loading animals onto stalls
A steamer has 12 stalls. There are cows, horses, and calves, each available in sufficient quantity. In how many ways can the stalls be filled, assuming each stall receives exactly one animal?
H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. XI. Permutations and Combinations, Examples XI.b, No. 8
Stuck? A gentle nudge
Your answer
Loading the math keyboard…
Type naturally — sqrt, pi, / and ^ become notation. Any equivalent form is accepted. Press Enter to check.