A PIN for a certain website must consist of four different digits from the set 0 1 2 7 For example 6012 or 0513 How many

Question

A PIN for a certain website must consist of four different digits from the set 0 1 2 7 For example 6012 or 0513 How many different PINs are possible Answer The number of PINs is P n k where n The final numerical answer is and k

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