199 réponses à ce sujet

[Rose of Mars]

Strangely Brown wrote...

AAAAAUUUUUUUUUUUUGGGGGGGGGGGGGGHHHHHHHHHHHHHHHHH!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Kidney stone?

Here, Poll. Knock yourselves out: http://social.biowar...08/polls/18165/

[Maria Caliban]

48÷2(9+3) = 48/2*12 = 24*12 = 288

[Creature 1]

48÷2(9+3) = 48*0.5*(9+3) = 48*0.5*12

Then multiply in whatever frickin' order you like.

48*0.5*12 = 24*12 = 288
48*0.5*12 = 48*6 = 288

Can we be done now? I need some caffeine.

[RainyDayLover]

Creature 1 wrote...

48÷2(9+3) = 48*0.5*(9+3) = 48*0.5*12

Then multiply in whatever frickin' order you like.

48*0.5*12 = 24*12 = 288
48*0.5*12 = 48*6 = 288

Can we be done now? I need some caffeine.

But you're technically carrying out the divison operation when flipping the 2 over to 1/2 (which is of course correct)

Just sayin'

[Rockpopple]

Bjelseth wrote...

 http://forum.bodybui...php?t=133389973
What is the answer? I fail at math, even basic ****.
48÷2(9+3) = ????
2 or 288?


Also how do I add a poll to this post?

48 / 2 X (9+3) = ?
48 / 2 X 12 = ?
24 X 12 = ?
288 = ?

I've always hated math. Seriously. God damn.... mother.... arrgh.

[Nattfare]

Gah! Maths! Get away!

*Makes sign to ward against evil*

[Creature 1]

RainyDayLover wrote...

Creature 1 wrote...

48÷2(9+3) = 48*0.5*(9+3) = 48*0.5*12

Then multiply in whatever frickin' order you like.

48*0.5*12 = 24*12 = 288
48*0.5*12 = 48*6 = 288

Can we be done now? I need some caffeine.

But you're technically carrying out the divison operation when flipping the 2 over to 1/2 (which is of course correct)

Just sayin'

Yes, but the division seems to be adding to confusion with people asking "do you divide first or multiply first??"  Division and multiplication are essentially the same thing, after all.  Maybe removing the division smokescreen will make it easier to see. 

[Wittand25]

Pacifien wrote...

I suppose the confusion lies on whether you interpret 2(9+3) as 2x or 2 * x.

That is exactly the same term.

The problem is that many asume a/b*c=(a/b)*c=a/(b*c)
The first equation is correct since per definition you always calculate a term from left to right.
Multiplication is associative ,division however is not associative and to avoid easily misinterpreted terms like in the first post a/b is defined as a*(b^-1) and the division replaced by a multiplication so that associativity can still be used in solving an equation.

The correct solution is 288 as many others in this thread have already said.

Modifié par Wittand25, 08 avril 2011 - 05:44 .

[BeljoraDien]

I admit I didn't read the entire thread, but reading the first 2 pages drove me crazy.

The problem is: 48/2(9+3) using infix notation (obviously).
1. 48/2(9+3)
2. =48/2(12)
3. (Now, left to right) =24(12)
4. =288

To confirm this I punch this exact equation into my TI-89: 48/2(9+3) and it spits out 288.
I have a BS in Electrical Engineering and I've taken Calculus 3(with an A) if any of that tells you anything about my ability to do basic arithmetic.

[chunkyman]

Am I the only one who got 16?

[BeljoraDien]

chunkyman wrote...

Am I the only one who got 16?

ROFL! You win the thread...

[Creature 1]

Ok, now assume I present you with three boxes. I tell you one contains $1,000,000 and if you pick that box, you get to keep the money. After you pick, I open one of the other two boxes. It is empty. I then give you a chance to change your first pick. Should you stick with your initial guess, or switch to the other box?

[DinoCrisisFan]

2

[DinoCrisisFan]

Ivandra Ceruden wrote...

Err...this is ridiculous...you're asking a MATH question on a GAMING FORUM??? We got better things to do than make your homework for you! If you can't solve it yourself, search the net or ask someone in you near environment like family or friends...seriously...

This is off-topic. Deal with it.

[Rockpopple]

Creature 1 wrote...

Ok, now assume I present you with three boxes. I tell you one contains $1,000,000 and if you pick that box, you get to keep the money. After you pick, I open one of the other two boxes. It is empty. I then give you a chance to change your first pick. Should you stick with your initial guess, or switch to the other box?

Can I pick the vacation to Hawaii instead?

[RainyDayLover]

Creature 1 wrote...

Ok, now assume I present you with three boxes. I tell you one contains $1,000,000 and if you pick that box, you get to keep the money. After you pick, I open one of the other two boxes. It is empty. I then give you a chance to change your first pick. Should you stick with your initial guess, or switch to the other box?

Switching = higher probability of picking the box with $$$

[mousestalker]

Creature 1 wrote...

Ok, now assume I present you with three boxes. I tell you one contains $1,000,000 and if you pick that box, you get to keep the money. After you pick, I open one of the other two boxes. It is empty. I then give you a chance to change your first pick. Should you stick with your initial guess, or switch to the other box?

Switch of course. Thanks Monty! 

[Wittand25]

Creature 1 wrote...

Ok, now assume I present you with three boxes. I tell you one contains $1,000,000 and if you pick that box, you get to keep the money. After you pick, I open one of the other two boxes. It is empty. I then give you a chance to change your first pick. Should you stick with your initial guess, or switch to the other box?

Switch since the probability that the other box has the price is 2/3, while picking the right box right at the start only has a probability of 1/3

[DinoCrisisFan]

http://www.wolframal.../?i=48÷(2(9+3))

[Rose of Mars]

Creature 1 wrote...

Ok, now assume I present you with three boxes. I tell you one contains $1,000,000 and if you pick that box, you get to keep the money. After you pick, I open one of the other two boxes. It is empty. I then give you a chance to change your first pick. Should you stick with your initial guess, or switch to the other box?

When I first picked the box, I had 3 choices, ergo 33% chance of getting the prize.

Since now I know your box is empty, I have a 50% chance of getting the prize. Because there's only 2 choices left. (which means my 33% chance got bumped to 50%, because of the elimination of a possibility)


Hmmmm... It's a 50/50 chance. Sooo (since I'm stubborn), I would keep my box 

Modifié par Rose of Mars, 08 avril 2011 - 05:50 .

[Creature 1]

DinoCrisisFan wrote...

http://www.wolframal.../?i=48÷(2(9+3))

Input was incorrect, correct input is 48÷2(9+3), not 48÷(2(9+3)).  When corrected, returned the correct answer of 288. 

[RainyDayLover]

DinoCrisisFan wrote...

http://www.wolframal.../?i=48÷(2(9+3))

That's because you inserted parentheses around the 2(9+3)

[BeljoraDien]

DinoCrisisFan wrote...

http://www.wolframal.../?i=48÷(2(9+3))

http://www.wolframal...ut/?i=48÷2(9+3)