Question: You are creating a 4 digit pin code, where each digit is chosen from 0-9. How many choices are there if a} There are no

You are creating a 4 digit pin code, where each digit

You are creating a 4 digit pin code, where each digit is chosen from 0-9. How many choices are there if a} There are no restrictions. b} No digit is repeated. c) No digit is repeated, the second digit is a 3. d} The ending pin is a number greater than 5,000

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