Off-Topic

[ggsimmonds]

re: Off-Topic

Let me make sure I'm getting the door problem right.

You got doors 1,2, and 3.

You pick door 1.

The host reveals door 2 to be a goat.

He then asks you if you want to switch to door 3?

Is that right? If so I don't understand the confusion.

[Blzer]

re: Off-Topic

Let me make sure I'm getting the door problem right.

You got doors 1,2, and 3.

You pick door 1.

The host reveals door 2 to be a goat.

He then asks you if you want to switch to door 3?

Is that right? If so I don't understand the confusion.

That is correct.

[ggsimmonds]

re: Off-Topic

Seems straightforward to me. Its akin to a lifeline on Who Wants to be a Millionaire. The host in essence is removing one of the incorrect answers for you.

This does kind of remind me of a date I had couple weeks back. She said her friend introduces her as being very honest. I told her that next time she should reply that her friend is lying. Told her it would be funny to mess with people's heads. She could not grasp the paradox behind that. Of course my explanation probably only made it worse. Guess I needed Speedy's work friend to make a infographic lol

[Caulfield]

re: Off-Topic

I wanna know why so many people have such disdain for goats. You know how much money you can save in lawn care & garbage disposal with a goat? And I bet anything Monty Hall never let any contestant keep a goat. The only real problem I can see with goats is they might think they so bad as LL Cool J. Props if you get the reference.

[Speedy]

re: Off-Topic

Let me make sure I'm getting the door problem right.

You got doors 1,2, and 3.

You pick door 1.

The host reveals door 2 to be a goat.

He then asks you if you want to switch to door 3?

Is that right? If so I don't understand the confusion.

The confusion lies in the statistical probability of winning as staying with door 1 (1/3 chance of winning) gives a lower likelihood of winning versus switching to door 3 (2/3 chance of winning). That's what I find difficult to grasp as it feels like it should be 50%.

[pietasterp]

re: Off-Topic

I have another one that some of the greater minds (like Einstein) had trouble solving the first time. It's not probability, just math (and some logic).

Say you're riding a bike on a two-mile path, the first mile being uphill and the second mile downhill. At best, you are only able to ride the first mile uphill at an average speed of 15 MPH. How fast would you have to bike on the downhill mile to achieve an overall average speed of 30 MPH for that two-mile path?

I just wasted half my day thinking about this...

Spoiler

I have no idea, but is the answer that it's not possible? That seems wrong but I can't figure out what's wrong with my thinking/math....

[Caulfield]

re: Off-Topic

I have another one that some of the greater minds (like Einstein) had trouble solving the first time. It's not probability, just math (and some logic).

Say you're riding a bike on a two-mile path, the first mile being uphill and the second mile downhill. At best, you are only able to ride the first mile uphill at an average speed of 15 MPH. How fast would you have to bike on the downhill mile to achieve an overall average speed of 30 MPH for that two-mile path?

if the obvious answer is wrong, then I want to know why its wrong.

Spoiler

45 mph downhill seems obvious to me but if its more complicated than that I'll be interested in knowing the why.

Edit - sorry, probably should have used spoilers from the outset

[pietasterp]

re: Off-Topic

if the obvious answer is wrong, then I want to know why its wrong.

Spoiler

45 mph downhill seems obvious to me but if its more complicated than that I'll be interested in knowing the why.

Edit - sorry, probably should have used spoilers from the outset

So this is the natural tendency, I think (that was my first instinct as well), but it doesn't apply in this case because you don't spend the same amount of time going at each speed. The way I was thinking about it (which may not be correct), figure out how long it takes to go the first mile at 15MPH. Now figure out how long you have to cover the 2 miles in order to average 30 MPH.

D'oh!

[NolanRyansSnowmonkey]

re: Off-Topic

I have another one that some of the greater minds (like Einstein) had trouble solving the first time. It's not probability, just math (and some logic).

Say you're riding a bike on a two-mile path, the first mile being uphill and the second mile downhill. At best, you are only able to ride the first mile uphill at an average speed of 15 MPH. How fast would you have to bike on the downhill mile to achieve an overall average speed of 30 MPH for that two-mile path?

Spoiler

If 15mph equals a mile every 4 minutes, then the total trip would be 8 minutes for two miles.

If you want to go an average of 30mph, that would be 2 minutes per mile, or 4 minutes for 2 miles.

Since it took 4 minutes to get the first mile marker, it seems you would need to go 186,000.000001 miles per second to get to the goal of 4 minutes for two miles...

Or... i don't know lol.


What does uphill/downhill have to do with anything if we are talking average mph?
Still wondering about that...

[NolanRyansSnowmonkey]

re: Off-Topic

So this is the natural tendency, I think (that was my first instinct as well), but it doesn't apply in this case because you don't spend the same amount of time going at each speed. The way I was thinking about it (which may not be correct), figure out how long it takes to go the first mile at 15MPH. Now figure out how long you have to cover the 2 miles in order to average 30 MPH.

D'oh!

Thats kinda what i was doing.... lol

[kehlis]

re: Off-Topic

So this is the natural tendency, I think (that was my first instinct as well), but it doesn't apply in this case because you don't spend the same amount of time going at each speed. The way I was thinking about it (which may not be correct), figure out how long it takes to go the first mile at 15MPH. Now figure out how long you have to cover the 2 miles in order to average 30 MPH.

D'oh!

Yea but I feel like we are missing info in the original question.

15 for one mile plus 45 for the second mile averages 30 for two hours so without knowing any variables, that would have to be the right answer in it's simplest form.

If this gets into looking up calculations for inertia and **** I'm out.

[NolanRyansSnowmonkey]

re: Off-Topic

Yea but I feel like we are missing info in the original question.

15 for one mile plus 45 for the second mile averages 30 for two hours so without knowing any variables, that would have to be the right answer in it's simplest form.

If this gets into looking up calculations for inertia and **** I'm out.

45 was my first thought too. Then i thought no. Einstein wouldnt have trouble with that lol.

[Caulfield]

re: Off-Topic

The way I was thinking about it (which may not be correct), figure out how long it takes to go the first mile at 15MPH. Now figure out how long you have to cover the 2 miles in order to average 30 MPH.

D'oh!

why do you need to know that?




is it possible to go 15 mph over a one mile distance? yes.




is it possible to go 45 mph over a one mile distance? yes.




so the average is 30 mph

[countryboy]

re: Off-Topic

My Dad suffered a heart attack yesterday morning and is once again back in the hospital. He is in pretty good spirits as they work to get him stabilized again. His heart is extremely weak and damaged from past incidents that there is nothing they can do for his heart other than treat with medicine to prolong life.

He currently has fluid around his heart that they are using dialysis to remove. Once they get that off he should be able to come home. He spent Father's Day in the PCU at the hospital and will now most likely spend his 65th birthday in there, which is Thursday.

Sorry for the Debbie Downer post...just needed to put something to paper.

[NolanRyansSnowmonkey]

re: Off-Topic

why do you need to know that?




is it possible to go 15 mph over a one mile distance? yes.




is it possible to go 45 mph over a one mile distance? yes.




so the average is 30 mph

Seems like 45mph for the second mile would average out to 22.5 mph for the entire 2 mile stretch...