A key code must contain 2 letters and 3 numbers

asked Apr 12, 2017 104k views

2 votes

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6 votes

26 letters {A; B; C; D;...;Z}

10 numbers {0; 1; 2; 3;...;9}

L-letter; N-number

code
LLNN
LNLN
LNNL
NNLL
NLNL
NLLN

26 · 26 · 10 · 10 · 6 = 135,200

Contactmatt answered Apr 14, 2017

8.7k points

1 vote

26 choices for each letter, 10 for each number, do 26×26×10×10×10

Joshua Green answered Apr 18, 2017

7.5k points

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