Probability Puzzles

Three logicians went to bar for having a drink.
The bar person asks the logicians “Do they all want to have the drink?”.
The first logician replied, ” I don’t know”.
The second logician replied, ” I don’t know”.What is the reply of the last logician?
View SolutionSubmit Solution 248 views
 1 answers
 0 votes

What if somebody offered to bet that at least two people in your Social group had the same birthday?
Would you take the bet?
How large must a social group be to make the probability of finding two people with the same birthday at least 50%?
Submit Solution 189 views
 0 answers
 0 votes

At the local Puzzlefry Internet dispatch center, the packing department was getting ready for the weekend.
However, it was late in the day and the final five packages were ready to be labelled.
Unfortunately, John dropped the labels to the packages and then had no idea which label belonged to which packet.
What is the probability that John managed to correctly label exactly four of the five packages?
View SolutionSubmit Solution 344 views
 2 answers
 0 votes

Jahn and his wife went to a party where four other married couples were present. Every person shook hands with everyone he or she was not acquainted with. When the handshaking was over, John asked everyone, including his own wife, how many hands they shook. To his surprise, Jahn got nine different answers.
How many hands did John’s wife shake ?
View SolutionSubmit Solution 667 views
 1 answers
 0 votes

I ask people at random if they have two children and also if one is a boy born on a tuesday. After a long search I finally find someone who answers yes.
What is the probability that this person has two boys?
Assume an equal chance of giving birth to either sex and an equal chance to giving birth on any day.
View SolutionSubmit Solution 708 views
 2 answers
 0 votes

There is 38 numbers. What is the least number of comparison needed to find the 2nd smallest out of them?
Submit Solution 1601 views
 0 answers
 0 votes

Ring City has 100 houses arranged in a circle. Alice starts at her own house, and every day she randomly moves to one of the two adjacent houses, each with 50% probability.She repeats this until she has visited all of the houses.
Which house(s) is/are the most likely to be visited last?
View SolutionSubmit Solution 1625 views
 2 answers
 0 votes

What is the least number of Candidates needed to appear in a examination of 300 marks, such that there is greater than a 50% chance that at least two of the candidates will have same marks?
View SolutionSubmit Solution 947 views
 1 answers
 0 votes