Help me to answer this Tricky Question
- Thread starter jr_sci
- Start date
I remember being posed this question when younger. It works better when nothing is wrote down and it's all spoken, because you do scratch your head a bit more, especially if it's spoken through correctly.
The Monty Hall Paradox was always my favourite for causing lots of head scratching, bemusement and heated debate...
You're on a game show and you're presented with 3 doors. Behind 2 doors are goats and behind one a car.
The host asks you to pick a door to open. You pick door 1.
The host, who knows what's behind each door, then opens door 2 revealing a goat. He then asks if you want to swap.
Should you swap?
Answer: You should always swap.
The Monty Hall Paradox was always my favourite for causing lots of head scratching, bemusement and heated debate...
You're on a game show and you're presented with 3 doors. Behind 2 doors are goats and behind one a car.
The host asks you to pick a door to open. You pick door 1.
The host, who knows what's behind each door, then opens door 2 revealing a goat. He then asks if you want to swap.
Should you swap?
Answer: You should always swap.
[ame="http://www.youtube.com/watch?v=6Rl_p3JlSd0"]YouTube - 21, The Movie: Variable Change[/ame]
[A] You pick the car, host shows a goat, you switch to a goat and lose.
You pick goat #1, host shows goat #2, you switch to the car and win.
[C] You pick goat #2, host shows goat #1, you switch to the car and win.
That gives you a 2/3 or 66.67 % chance of winning.
PS ^ Good movie.
[A] You pick the car, host shows a goat, you switch to a goat and lose.
You pick goat #1, host shows goat #2, you switch to the car and win.
[C] You pick goat #2, host shows goat #1, you switch to the car and win.
That gives you a 2/3 or 66.67 % chance of winning.
PS ^ Good movie.
The solution:
if you're finding how much money each one paid then you subtract the 2 dollars not add it. That gives you $70. Collectively they paid $70 not $75.
The riddle's purpose is to try to distract you into thinking you're trying to find the $75 by accounting for the $2 first paid then giving you the math for the ending paid.