Answer to Question #30659 in Algebra for Brooke

Question

for the given configuration, determine how many different computer passwords are possible if (a) digits and letters can be repeated, and (b) digits and letters cannot be repeated.
A. 3 digits followed by 4 letters
B. 1 letter followed by 6 digits
C. 2 digits followed by 5 letters
D. 4 letters followed by 4 digits