A bank PIN is a string of four digits, each digit 0-9. How many choices are there for a PIN if the first digit cannot be

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A bank PIN is a string of four digits, each digit 0-9. How many choices are there for a PIN if the first digit cannot be

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A Bank Pin Is A String Of Four Digits Each Digit 0 9 How Many Choices Are There For A Pin If The First Digit Cannot Be 1
A Bank Pin Is A String Of Four Digits Each Digit 0 9 How Many Choices Are There For A Pin If The First Digit Cannot Be 1 (17.1 KiB) Viewed 116 times
A bank PIN is a string of four digits, each digit 0-9. How many choices are there for a PIN if the first digit cannot be a 0, also, even digit and odd digit cannot be next to each other? (Repeat digit is allowed.) Explain how you arrived at your answer - and DO NOT simplify your answer. Answer without explanation will not receive full credit.
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