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TO USE --> BA II Plus Calculator!!! Determine the number of 5-charactercodes that can be created if you are to use 9numbers (1 to 9)and

TO USE --> BA II Plus Calculator!!!

Determine the number of 5-charactercodes that can be created if you are to use 9numbers (1 to 9)and 20 letters and:

a.Code is to be all numbers with no repetition. N N N N N

b. Code is to be Number, Letter, Number, Letter, Number with no repetition. N L N L N

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