Question

John is choosing a password for his access to the internet. He decided not to use the digit 0 or the letter M. Each letter or number may be used more than once. How many passwords of 2 letters followed by 4 digits are possible?

a.)4,200,625
b.)3,100,625
c.)4,100,625
d.)3,100,500

Answer 1

its C 4100625 passwords 

Answer 2

There are 4100625 possible passwords of 2 letters followed by 4 digits

How to determine the number of passwords?

The usable characters are:

• Digits 1 - 9 i.e. 9 digits
• All alphabets except M i.e. 25 letters

Given that the characters can be repeated, and the password uses 2 letters and 4 digits.

The number of password is:

Password = 25* 25 * 9*9*9*9

Evaluate

Password = 4100625

Hence, there are 4100625 possible passwords

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