Neil Needs To Choose Four Digit Pin Number..Each Digit Can Be Chosrn From 0 To 9..How Many Possible Numbers Can Neil Choose

Neil needs to choose four digit pin number..each digit can be chosrn from 0 to 9..how many possible numbers can neil choose

 {n}^{r}  \\  =  {10}^{4} \\  = 10000 \:  ways


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