Hi 

There is a locker lock with the digits 1-6 on it. 

 nPx =     6P4 = 6!/2! = 360 different combinations w/o repeating digits

P(1-5-3-4) =  1/360 

Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
 If numbers can be repeated, eg, 1111, then there are 6^4 possibilities

= 1296

--> 1/1296

 

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