December 14, 2009

Find the probability



In a hotel, rooms are numbered from 101 to 550. A room is chosen
at random. What is the probability that room number starts with
1, 2 or 3 and ends with 4, 5 or 6?

3 comments:

  1. AnonymousDecember 15, 2009 at 3:22 AM

    20%

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  2. VarunDecember 20, 2009 at 9:35 AM

    This comment has been removed by the author.

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  3. Secret SquïrrelDecember 30, 2009 at 6:43 AM

    There are 90 room numbers that meet the criteria (104, 105, 106, 114,... 396) and 450 rooms so the probability is 90/450 or 20%.

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