The 4-digit combination padlock is the most common bike padlock. (a) What is the probability that a
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Question:
The 4-digit combination padlock is the most common bike padlock.
(a) What is the probability that a random lock code does not have any repeating digits?
(b) There are 10 bikes at a bike station. Each of the 10 bikes are locked with a 4-digit combination padlock. What is the probability that five lock codes have non-repeating digits?
(c) Find the probability that a random lock code has two non-repeating even and two non-repeating odd digits. Note that 0 is treated as an even digit.
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