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You are not logged in. #1 20121214 07:11:28
[Discrete Math] Finals review problems in ProbabilityThere are a couple of problems which even the discussion board on our University website has not answered: #2 20121214 07:32:10
Re: [Discrete Math] Finals review problems in ProbabilityHi I am getting for the first problem and for the second problem. Last edited by anonimnystefy (20121214 08:01:01) The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #3 20121214 07:52:39
Re: [Discrete Math] Finals review problems in ProbabilityHi Festisio1;
Assuming 365 days ( a non leap year ) you would need 253 people. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #4 20121214 07:54:24
Re: [Discrete Math] Finals review problems in ProbabilityHi bobbym Last edited by anonimnystefy (20121214 08:00:39) The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #5 20121214 07:57:13
Re: [Discrete Math] Finals review problems in ProbabilityHi; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #6 20121214 08:04:42
Re: [Discrete Math] Finals review problems in ProbabilityThe probability that less than 2 people have their birthdays on April 1st is (364/365)^n+n*1/365*(364/365)^(n1). This probability needs to be less than or equal to 1/2. The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #7 20121214 08:09:50
Re: [Discrete Math] Finals review problems in ProbabilityThe probability of having the birthday April 1 is 1 / 365. The probability than n people do not have that birthday is So solve: n = 252.65 which is rounded to 253. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #8 20121214 08:12:15
Re: [Discrete Math] Finals review problems in ProbabilityYou are not reading the question! The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #9 20121214 08:16:49
Re: [Discrete Math] Finals review problems in ProbabilityHi;
You are right we are both not reading the question. The answer is 613. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #10 20121214 08:20:08
Re: [Discrete Math] Finals review problems in ProbabilityWell, the expected number of people for two birthdays on the 1st of April cannot be less than for one birthday. The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #11 20121214 08:24:21
Re: [Discrete Math] Finals review problems in ProbabilityHi; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #12 20121214 08:25:54
Re: [Discrete Math] Finals review problems in ProbabilityNow it's okay. Though I changed it 25 minutes ago, and you didn't notice... The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #13 20121214 08:27:30
Re: [Discrete Math] Finals review problems in ProbabilityFor the birthday problem  the book answer is 614 (book assumes 366 days a year) I have sheets and sheets of paper  but I am not getting close  I hate looking at the answer first, because I try to understand the concepts of obtaining them.. in these cases I could not find them There again, I have been studying for 3 finals, which are tonight, and two more tomorrow, so I may be a little tired and missing things. Last edited by Festisio (20121214 08:29:02) #14 20121214 08:33:16
Re: [Discrete Math] Finals review problems in ProbabilityHi; That equation must be solved. Hi anonimnystefy; I was working on the problem so I did not notice. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #15 20121214 08:34:50
Re: [Discrete Math] Finals review problems in ProbabilityWell, for the second problem, the book is wrong. The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #17 20121214 08:41:40
Re: [Discrete Math] Finals review problems in ProbabilityHi Festisio; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #18 20121214 08:59:37
Re: [Discrete Math] Finals review problems in Probability
Yes, that's correct. Last edited by Festisio (20121214 09:05:16) #19 20121214 09:01:34
Re: [Discrete Math] Finals review problems in ProbabilityHi; also.
I do not know about the 7th edition but the 6th edition has the answer to this problem just a few pages away! In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #20 20121214 09:16:50
Re: [Discrete Math] Finals review problems in Probability
I'm not understanding their examples.. I had to find help on Bayes' from youtube  book does not even mention using a tree to simplify things.. #21 20121214 09:27:07
Re: [Discrete Math] Finals review problems in ProbabilityHi; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #23 20121214 09:49:26
Re: [Discrete Math] Finals review problems in Probability
How are you getting (4n+6)/3? The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #24 20121214 09:58:08
Re: [Discrete Math] Finals review problems in ProbabilityHi; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #25 20121214 10:06:54
Re: [Discrete Math] Finals review problems in ProbabilityOn which page is that? The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment 