Sagot :
Step-by-step explanation:
Answer : 27720
Solution : We have to arrange 12 balls, out of which 3 are of one kind, 4 are of second kind and 5 are of third kind. <br> Required number of arrangements `=(12!)/((3!) xx(4!) xx (5!))`.

Step-by-step explanation:
Answer : 27720
Solution : We have to arrange 12 balls, out of which 3 are of one kind, 4 are of second kind and 5 are of third kind. <br> Required number of arrangements `=(12!)/((3!) xx(4!) xx (5!))`.