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There are 5 keys. Each one will open one of five cars. If i pick one of the keys at random and try to open one of the cars what is the probability that its the right key?

Mathematics
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1/5 ?
right - you guys are pretty good - most people say its 1/25
- it doesn't matter which key you pick

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Other answers:

\[\langle x\rangle=\frac{1/5}{1}=\frac 15\]

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