Answered

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Give the 10 digits, you could create different 2- digits passcode ? You can only use each digit once

Sagot :

Given:

The total number of digits =10.

We need to create 2 digits passcode.

We can not repeat the digits.

II would appreciate your feedback - you can provide it by rating the session.n this case, we can use

[tex]nP_r=\frac{n!}{(n-r)!}[/tex]

Substitute n=10 and r=2, we get

[tex]10P_2=\frac{10!}{(10-2)!}[/tex]

[tex]10P_2=\frac{10\times9\times8!}{8!}[/tex]

[tex]10P_2=90[/tex]

We can create 90 different 2 digits passcode.

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