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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EX Marks the SpotIn 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?
2 guesses to EX Marks the Spot |
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None, they are not in the directory.
Correct, Crazynomad!
Ex-directory subscribers are no longer in the directory.
You’re today’s winner.