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Mathematics 12 Online
OpenStudy (anonymous):

A bank’s ATM card requires that a customer set a four digit pin number. Each digit may be any number from 0 to 9. How many guesses would it take to achieve a 50% probability of guessing a customer’s pin number if you knew that the pin number contained at least one 3?

OpenStudy (anonymous):

@freckles i need some help man :(

OpenStudy (rccb):

multiple choice?

OpenStudy (rccb):

or no?

OpenStudy (rccb):

well the answer i got is 2000,

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