Customer account "numbers" for a certain company consist of 4 letters followed by 4 numbers. How...

Question

Question

Customer account "numbers" for a certain company consist of 4 letters followed by 4 numbers.

How many different account numbers are possible if repetitions of letters and digits are not allowed?

math Statistics-And-Probability

Answer 1

Answer #1

Solution:-
You have 26 choices for letters and 10 choice for numbers with out repetitions

=> 26*25*24*23 x 10*9*8*7 = 1808352000

Answer 2

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