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Numerade Educator



Problem 24 Easy Difficulty

Suppose your cell phone uses a 4-digit personal identification number (PIN) to lock it from use.
Use probability to explain how someone is unlikely to guess your PIN.



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Video Transcript

all right. On the previous question, we talked about how there were 5000 40 possible four digit pin numbers for someone to pick. The exact one that is yours would be one in 5040. Do you think about that as a decimal? That's going to be 0.0 1 98 Or if you think of it as a percent, that is 0.0, removing over 0.198%. You're talking about a probability that someone guesses your pin them.

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