lke123
23.07.2019 •
Mathematics
An identification code is to consist of 2 letters followed by 3 digits. how many different codes are possible if repetition is not permitted
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Ответ:
11232000
Step-by-step explanation:
Given that an identification code is to consist of 2 letters followed by 3 digits.
Also given that repetition is not permitted.
Since order matters here we find that permutation to be used.
Out of 26 letters, 2 letters can be selected without repitition in
ways
And 3 codes can be selected from 10 digits in
ways
Hence total number of codes =
No of ways = 11232000
Ответ:
b
Step-by-step explanation: