Eight people enter an elevator. At each of four floors atleast one person leaves the elevator after which elevator is empty. The number of ways in which this is possible is :

Four die are rolled. The number of ways in which atleast one die shows 3, is

Four die are rolled. The number of ways in which atleast one die shows 3 , is

Four die are rolled. The number of ways in which atleast one die shows 3, is

Four die are rolled. The number of ways in which atleast one die shows 3 , is

Four persons entered the lift cabin on the ground floor of a six floor office . if the 4 persons can leave the cabin at any one of the 5 floors , then find the number of ways in which this can be done

In a hotel , four rooms are available , Six persons are to be accommodated in these four rooms in such a way that each of these rooms contains at least one person and at most two persons . Then the number of all possible ways in which this can be done is ______

45 In a hotel four rooms available. Six persons are to be accommodated in these four rooms in such a way that each of these rooms contains at least one person and at most two persons. Then the number of all possible ways in which this can be done is 'P'. Then sum of digits of 'P' is equal to

A shopkeeper has 11 copies each of nine different books, then the number of ways in which atleast one book can be selected is