Beach Day by Rodger Bliss
September 2022
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EX Marks the Spot

In the town of Biddulph, 7% of all telephone subscribers are ex-directory. If you pick 500 people at random from the telephone directory, how many will have ex-directory numbers?

 

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2 guesses to EX Marks the Spot


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  • Crazynomad

    None, they are not in the directory.

  • Dude

    Correct, Crazynomad!

    Ex-directory subscribers are no longer in the directory.

    You’re today’s winner.