CAR RACE A NEW YORK CAR SALESMAN TELLS HIS TWO SONS TO RACE THEIR CARS TO ATLANTIC C ,UME THAT YOU ARE TRAPPED IN A HOUSE AND THE DOOR HAS A PCODE MADE IN THE COMBINATION OF 4 WHOLE NUMBERS FROM 1 TO 100 TWO NUMBERS ARE REVEALED AND YOUR DUTY IS TO FIND OTHER TWO NUMBERS TO GET OUT OF THE HOUSE IF NOT YOU WILL DIE IN ANOTHER 2 HOURS ,UME THAT YOU ARE TRAPPED IN A HOUSE AND THE DOOR HAS A PCODE MADE IN THE COMBINATION OF 4 WHOLE NUMBERS FROM 1 TO 100 TWO NUMBERS ARE REVEALED AND YOUR DUTY IS TO FIND OTHER TWO NUMBERS TO GET OUT OF THE HOUSE IF NOT YOU WILL DIE IN ANOTHER 2 HOURS RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

A Toy-Yoda Did you answer this riddle correctly?
YES  NO  

Oven Did you answer this riddle correctly?
YES  NO  

Advent calendar Did you answer this riddle correctly?
YES  NO  

She wanted a sales pitch. Did you answer this riddle correctly?
YES  NO  

So he could take it out for a spin. Did you answer this riddle correctly?
YES  NO  

Noise Did you answer this riddle correctly?
YES  NO  

Playing Monopoly. Did you answer this riddle correctly?
YES  NO  

The answer is 20. Many people have been guessing anywhere from 9 to 19, but the correct answer is 20. Did you answer this riddle correctly?
YES  NO  

A living room. Did you answer this riddle correctly?
YES  NO  

He was playing Monopoly Did you answer this riddle correctly?
YES  NO  

An unborn chick in an egg. Did you answer this riddle correctly?
YES  NO  

An antique! Did you answer this riddle correctly?
YES  NO  

50 Did you answer this riddle correctly?
YES  NO  

A wreath Did you answer this riddle correctly?
YES  NO  

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