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prisoha [69]
3 years ago
9

A key code must contain 2 letters and 3 numbers

Mathematics
2 answers:
Alchen [17]3 years ago
7 0
26 choices for each letter, 10 for each number, do <span><span>26×26×10×10×10</span></span>
d1i1m1o1n [39]3 years ago
5 0
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
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