You are tasked to create a 7-digit password from the numbers 0,3,6,8,2,1,9, and 4
if no repetition of digits is allowed how many possible passwords will you create?
if no repetition of digits is allowed how many possible passwords will you create?
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We can plug 7 numbers on the first digit: because zero is not included
7 again on the second because zero can be included.
6 for the third because repetition is not allowed
5 for the fourth because repetion is not allowed
4 for the fourth because repetion is not allowed
3 for the fourth because repetion is not allowed
2 for the fourth because repetion is not allowed
By fundamental counting principle: We will multiply all of the entries: