SOLUTION: A serial number must consist of four different digits, followed by two different letters. how many different serial numbers of this form have the first digit 3 and the second digit

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Question 563376: A serial number must consist of four different digits, followed by two different letters. how many different serial numbers of this form have the first digit 3 and the second digit 5?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A serial number must consist of four different digits, followed by two different letters. how many different serial numbers of this form have the first digit 3 and the second digit 5?
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Pattern: DDDDLL
Ans: With or without replacement?
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Cheers,
Stan H.
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