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A security code consists of 9 digits (0–9), and a digit may not be used more than once. How many possible security codes are there?
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4 votes
A security code consists of 9 digits (0–9), and a digit may not be used more than once. How many possible security codes are there?

User Pagan
by
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2 Answers

2 votes

Answer: 362880 (?)

Explanation:

I believe this question is asking for a permutation, in which I plugged it into my graphing calculator as nPr(9,9) and got that answer.

User Scott Roepnack
by
5.8k points
4 votes

Answer:

a

Explanation:

User Turnerm
by
4.9k points
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