Question

There are 4 cards they are numbered 0-3 The cards get picked randomly and are placed in slots what is the probiblity of getting placed with the numbers 2013

Answer 1

so basically in this question u have to know the total possiblities of number that could form using the nos 0,1,2,3.
Now, 1st place( * _ _ _ ) its the place where i kept * ...can be placed with 4 nos that are 0,1,2,3 .so there are 4 possibilities ,after that place is filled we move on to the 2nd place ie (_*_ _) here since one of the 4 nos have been already placed in the 1st place we are left with remaining 3 nos.

is there a problem in your understanding then feel free to comment if not then i will move ahead