Question

My three-digit code is $023$. Reckha can’t choose a code that is the same as mine in two or more of the three digit-positions, nor that is the same as mine except for switching the positions of two digits (so $320$ and $203$, for example, are forbidden, but $302$ is fine). Reckha can otherwise choose any three-digit code where each digit is in the set $\{0, 1, 2, \dots, 9\}$. How many codes are available for Reckha

1. hongcuc2
It would probably be simplest to simply state the prohibited codes.
023 – narrators code
02x
0x3
x23
Here x is a number between 0 and 9, there are 10 of each, making a total of 30.
203
302
032
Consequently, there are 34 banned codes in all.
There are 103 = 1000 codes in all.
1000 – 34 = 966 codes are available.
What is narrators code?
• The Code Narrator enables a minute-by-minute examination of what takes place during a code. There is a spot where observations can be recorded, and entering code for prescriptions and infusions is simple.
• The Code Narrator is one of the EPIC-specific applications used by the Rapid Response Team (RRT) RN. notes drugs, compressions, patient rhythms, infusions, and any other process that occurs during a code in place of traditional scribing.