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 condi

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Question 729777: 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 must begin with an odd digit and end with an even digit. (Repetition OK)

Answer by fcabanski(1391) About Me  (Show Source):
You can put this solution on YOUR website!
Since digit one must be odd, it can only be 1,3,5,7 or 9. That means there are 5 possible digits for the first digit.


Digit two and three can be any digit from 0-9, so each one has 10 possible digits.


Since digit four must be even, it can only be 0,2,4,6,8. That's 5 possible digits for the fourth digit.


Since the digits can repeat, you can multiply the number of possible digits for each place.


5*10*10*5 = 2500 possible 4-digit passcodes.