question archive A thief steals an ATM card and must randomly guess the correct four-digit pin code from a 5-key keypad
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A thief steals an ATM card and must randomly guess the correct four-digit pin code from a 5-key keypad. Repetition of digits is allowed. What is the probability of a correct guess on the first try? The number of possible codes is ______ The probability that the correct code is given on the first try is _______
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