In a certain city, 5% of all the persons 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?
Its a bit tricky read carefully before answering !!
Share with your friends and family and see if they can give the right answer.
Answer is "ZERO".
All 100 names are selected from directory so no unlisted numbers selected !
at 11:54 AM