Question 1076837
A thief steals an ATM card and must randomly guess the correct five
​-digit 
pin code from a 9
​-key 
keypad. Repetition of digits is allowed. What is the probability of a correct guess on the first​ try? And number of possible codes? 
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Assuming 9-key mean zero up to 9,
# of possible codes = 10^5 = 100000
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Probability of first try correct = 1/10^5
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Cheers,
Stan H.
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