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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?
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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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