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
The Murder At Joe's Riddle
Some one was murdered at Joes Bar & Grill on a Sunday afternoon. The police interviewed the suspects and got their alibis. They were:
Cook: was cutting celery
Manager: was getting mail
Bartender: was filling the beer cooler
Cocktail waitress: was cutting fruit
Paul the regular: was reading the paper
The police arrested the murderer with no problem at all.
Who was the murder and how did the police know so easily?
Cook: was cutting celery
Manager: was getting mail
Bartender: was filling the beer cooler
Cocktail waitress: was cutting fruit
Paul the regular: was reading the paper
The police arrested the murderer with no problem at all.
Who was the murder and how did the police know so easily?
Hint:
It was the manager because the mail does not come on Sundays. Did you answer this riddle correctly?
YES NO
YES NO
Who Is Bigger Riddle
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The Baby Volcano Riddle
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The Same Tea Riddle
A woman was horrified to find a fly in her tea. The waiter took her cup and went into the kitchen and returned with a fresh cup of tea. She shouted, "You brought me the same tea!" How did she know?
Hint:
Sugar. She had already put sugar in it and when she tasted the new tea it was already sweet. Did you answer this riddle correctly?
YES NO
YES NO
The Vampire Flirt Riddle
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Female Pistil Riddle
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Diaper Duty Riddle
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BBQ Love Riddle
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A Birds Valentine
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Pencil And Paper Riddle
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The Chocolate Syrup Riddle
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Daddy Chimney Riddle
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A Man Needs A Map Riddle
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Running Through Fields And Woods Riddle
Riddle me this
I run over fields and woods all day. Under the bed at night I sit, never alone. My tongue hangs out, up and to the rear, waiting to be filled in the morning. What am I?
I run over fields and woods all day. Under the bed at night I sit, never alone. My tongue hangs out, up and to the rear, waiting to be filled in the morning. What am I?
Hint:
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