MediumHow Many Riddle
In a certain city, 5% of all the people in town have unlisted phone numbers. If you select 100 names at random from that city's phone directory, how many people selected will have unlisted phone numbers?
Riddle
In a certain city, 5% of all the people in town have unlisted phone numbers. If you select 100 names at random from that city's phone directory, how many people selected will have unlisted phone numbers?
Choose an answer
A.Five
B.Ten
C.Fifty
D.None. If their names are in the phone directory, they do not have unlisted phone numbers!
Hint: It's a 16-word phrase with 71 letters, starting with "N".
Answer
None. If their names are in the phone directory, they do not have unlisted phone numbers!
Why this is the answer
Anyone listed in the phone directory can't also have an unlisted number, making the percentage irrelevant to the sample.
This riddle is filed under How, What, Why Riddles and rated Medium.