SOLUTION: Hello, having issues with this question, please help. Using the digits 0 � 9, find out how many 4 digit passcodes (Like 0056 or 3984) can be configured based on the stated cond

Question 729775: Hello, having issues with this question, please help.
Using the digits 0 � 9, find out how many 4 digit passcodes (Like 0056 or 3984) can be configured based on the stated conditions.
The passcode can't start with a 0, a 1, or a 2 and no digits may be repeated.

Answer by fcabanski(1391) (Show Source): You can put this solution on YOUR website!
There are 7 possibilities for the first digit.

Since digits cannot repeat, there are 10-1 possibilities for the second digit (you've already used one for the first digit).

There are 10-2 possibilities for the 3rd digit.

There are 10-3 possibilities for the 4th digit.

7*9*8*7 = 3528 possible pass codes.

RELATED QUESTIONS
Hello, having issues with this question, please help Using the digits 0 � 9, find out (answered by fcabanski)

How many diffrent passcodes afe there in a four digit code with number 0 to... (answered by fcabanski)

Hello, I am having issues with this problem...I understand that I have to square both... (answered by jim_thompson5910)

PLS HELP... ASAP... 1. Write all the three digit numbers using the digits 4,6 and 8... (answered by edjones)

A student was asked to form two-digit numbers using the following digits:... (answered by ikleyn)

Please help me with this question How many four digit numbers, which are not... (answered by jhaashok630)

Hi, Hello i am Vanessa my daughter is really having hard time with this and i would... (answered by ankor@dixie-net.com)

A student was asked to form two-digit numbers using the following digits:... (answered by ikleyn)

The access code consists of four digits. The first digit cannot be zero and the last... (answered by ikleyn)