SOLUTION: How many seven-symbol computer passwords can be formed using the letters A to J and the digits 2 to 7? Is the Formula 10 for letters and 5 10*10*10*10*10

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Question 839276: How many seven-symbol computer passwords can be formed using the letters A to J and the digits 2 to 7?
Is the Formula
10 for letters
and 5
10*10*10*10*10
Found 2 solutions by Alan3354, richard1234:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
How many seven-symbol computer passwords can be formed using the letters A to J and the digits 2 to 7?
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A to J is 10 letters
2 to 7 is 6 numbers
--> 16 choices
======================
--> 16^7
= 268435456 passwords if it's not case sensitive, ie, if a = A, b = B, etc

Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
No, not quite. Where did you get the 5 from?

There are 10 letters and six (not five) numbers that can be used, so there are 16 choices for each position. The number of passwords is 16^7.