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3 years ago

Bank of America customers select their own three- digit personal identification number (PIN) for use at ATMs.

1 answer:

6 0

#1) Think of this as an experiment and list four possible outcomes.

Answer: There are 3 possible outcomes. The first one is for the condition that the first digit cannot be zero and the digits can be repeated: 9*10*10 = 900. The second outcome is if the digits cannot be repeated: 9*9*8 = 648. The last possible outcome is if zero can be the first digit an the numbers can be repeated: 10*10*10 = 1000. Also the probability of Mr. Jones and Mrs. Smith of selecting the same PIN is 1/900.

I hope it helps, Regards.

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3 years ago

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