The 100 Seat Airplane
People are waiting in line to board a 100-seat airplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise they will choose an open seat at random to sit in.
The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?
The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?
Hint: You don't need to use complex math to solve this riddle. Consider these two questions:
What happens if somebody sits in your seat?
What happens if somebody sits in Steve's assigned seat?
The correct answer is 1/2.
The chase that the first person in line takes your seat is equal to the chance that he takes his own seat. If he takes his own seat initially then you have a 100% chance of sitting in your seat, if he takes your seat you have a 0 percent chance. Now after the first person has picked a seat, the second person will enter the plan and, if the first person has sat in his seat, he will pick randomly, and again, the chance that he picks your seat is equal to the chance he picks someone your seat. The motion will continue until someone sits in the first persons seat, at this point the remaining people standing in line which each be able to sit in their own seats. Well how does that probability look in equation form? (2/100) * 50% + (98/100) * ( (2/98) * 50% + (96/98) * ( (2/96) * (50%) +... (2/2) * (50%) ) ) This expansion reduces to 1/2.
An easy way to see this is trying the problem with a 3 or 4 person scenario (pretend its a car). Both scenarios have probabilities of 1/2. Did you answer this riddle correctly?
YES NO
The chase that the first person in line takes your seat is equal to the chance that he takes his own seat. If he takes his own seat initially then you have a 100% chance of sitting in your seat, if he takes your seat you have a 0 percent chance. Now after the first person has picked a seat, the second person will enter the plan and, if the first person has sat in his seat, he will pick randomly, and again, the chance that he picks your seat is equal to the chance he picks someone your seat. The motion will continue until someone sits in the first persons seat, at this point the remaining people standing in line which each be able to sit in their own seats. Well how does that probability look in equation form? (2/100) * 50% + (98/100) * ( (2/98) * 50% + (96/98) * ( (2/96) * (50%) +... (2/2) * (50%) ) ) This expansion reduces to 1/2.
An easy way to see this is trying the problem with a 3 or 4 person scenario (pretend its a car). Both scenarios have probabilities of 1/2. Did you answer this riddle correctly?
YES NO
People Ride On My Back Riddle
I have four legs and a long tail.
I eat oats and hay.
I love to run fast.
I let people ride on my back.
What am I?
I eat oats and hay.
I love to run fast.
I let people ride on my back.
What am I?
Hint:
Satisfies Two People Riddle
Hint:
A Place Where People Stand
Go to a place where people stand
The roads are wide and the vehicles grand
A booth showing tickets for sale on top
This the place where the coaches stop
Where is this place?
The roads are wide and the vehicles grand
A booth showing tickets for sale on top
This the place where the coaches stop
Where is this place?
Hint:
Servant Of All Great People Riddle
After a few lessons I will do it automatically.
I am the servant of all great people and alas of all failures as well.
What am I?
Hint:
Poor People Have It Riddle
Hint:
Most People Dread Me Riddle
And the beginning of your school week
Most people dread my arrival, while some are happy to see me
What am I?
Hint:
Lazy People Shoes Riddle
Hint:
People Might Be British Riddle
This is the name of a continent
Which has fifty different countries
People living there might be British,
French, German, Polish or Maltese
Which has fifty different countries
People living there might be British,
French, German, Polish or Maltese
Hint:
An Elevator Of 13 People
An elevator held 13 people and was going to the 25th floor in a building. Suddenly, the elevator's wire broke and the elevator dropped 25 floors down. But all 13 people in the elevator didn't get injured. What happened to them???
Hint:
The 13 people didn't get injured.....they just died right away....0.0 Did you answer this riddle correctly?
YES NO
YES NO
People Cry At My Sight
I have a name that's not mine,
and no one cares about me in their prime.
People cry at my sight,
and lie by me all day and night.
What am I?
and no one cares about me in their prime.
People cry at my sight,
and lie by me all day and night.
What am I?
Hint:
Hung Around Peoples Necks
It can look like a T
It can look like an X
They can be found on chains
Hung around peoples necks
What is it?
It can look like an X
They can be found on chains
Hung around peoples necks
What is it?
Hint:
Three People Holding Gifts Riddle
This has three people holding gifts
And a few animals maybe
Plus shepherds, parents and angels
And in the center, a baby
What is this?
And a few animals maybe
Plus shepherds, parents and angels
And in the center, a baby
What is this?
Hint:
Fastening Two People
Hint:
The Serial Killer Husband
A man kills his wife. Many people watch him doing so. Yet no one will ever be able to accuse him of murder. Why?
Hint:
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