Mathematics, 19.02.2021 18:30 Hockeypro1127

An identification code is to consist of 4 letters followed by 4 digits. Determine the following a) How many different codes are possible if repetition is not permitted?
b) How many different codes are possible if repetition is permitted?
c) How many different codes are possible if repetition of letters is permitted, repetition of numbers is not permitted, and the first 4 letters must be the same le
d) How many different codes are possible if the first letter must be H. 1, or J and repetition of letters and numbers is not permitted?

An identification code is to consist of 4 letters followed by 4 digits. Determine the following

a

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An identification code is to consist of 4 letters followed by 4 digits. Determine the following a)...