Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

You are not logged in. #1 20060126 12:53:39
Coin flip question?A person sets out to toss a coin 20 times. On average, they expect to get 10 heads and 10 tails. #2 20060126 13:06:58
Re: Coin flip question?I would agree with Student B because the probability of tossing heads is always 50%...just because you have already seen the outcome of the first four tosses does not change the likelihood of the next outcome. The greatest challenge to any thinker is stating the problem in a way that will allow a solution. Bertrand Russell #3 20060126 13:12:21
Re: Coin flip question?True. I guessed student A because I guess I didnt read it real good. I didn't see the expect part. I was taking it for the whole instead of the next flip. #4 20060126 13:21:43
Re: Coin flip question?I'm a little rusty on my probability theory and I don't want to give you the wrong answer, so you may want to see what someone else says... The greatest challenge to any thinker is stating the problem in a way that will allow a solution. Bertrand Russell #5 20060126 15:27:47
Re: Coin flip question?I think my biology professor said it best: "In the real world, this would be a problem. But in mathematics, we can just define a place where this problem doesn't exist. So we'll go ahead and do that now..." #6 20060127 03:37:23
Re: Coin flip question?I guess that it'll land in akward position between two objects and thus land neither on heads or tails Last edited by rickyoswaldiow (20060127 03:37:35) Aloha Nui means Goodbye. #7 20060127 03:58:05
Re: Coin flip question?Student B is correct. Although you would expect 10 heads and tails from 20 coin tosses, this number changes with the additional information of the 4 heads. Why did the vector cross the road? It wanted to be normal. #8 20060127 04:53:21
Re: Coin flip question?
The quantum physics joke is that the coin lands and stays on it's side, and is both heads and tails at the same time. Wave/Particle duality rocks! "In the real world, this would be a problem. But in mathematics, we can just define a place where this problem doesn't exist. So we'll go ahead and do that now..." 