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Sarah cannot completely remember her four-digit ATM pin number. She does ... ...

[This is a difficult practice problem, and you will need a calculator.] Sarah cannot completely remember her four-digit ATM pin number. She does remember the first two digits, and she knows that each of the last two digits is greater than 5. The ATM will allow her three tries before it blocks further access. If she randomly guesses the last two digits, what is the probability that she will get access to her account?
(A) 3/16
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Nova Math - Problem Set Y: Probability & Statistics

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