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| Показать все ветки Спрятать все ветки Показать все сообщения Спрятать все сообщения | | Solution is simple | Igor Parfenov | 1961. Кантонский язык | 20 июн 2022 02:05 | 1 | The solution is just a very little more difficult, that the first, which comes to mind.
I tried firstly to count these probabilities (those are C(M, m) * C(N-M, n-m) / C(N, n)), but seems, it is impossible with these constraints. | | who can tell me? | Mattiev Jamol | 1961. Кантонский язык | 3 апр 2014 03:23 | 3 | what is the answer for these tests?
10 6 14
?
10 6 19
?
10 1 13
?
11 6 23
?
thanks beforehand.
I think:
1. 9
2. 12
3. 1
4. 13 Really appreciate these tests.
This problem is a little more difficult than I think :) | | wtf? | sfersox | 1961. Кантонский язык | 22 июн 2013 18:06 | 4 | wtf? sfersox 22 июн 2013 15:29 Re: wtf? Vedernikoff 'Goryinyich' Sergey (HSE: АОП) 22 июн 2013 17:54 Statement is more than clear. Solution is not that trivial. I can not understand this string "Help Vova to find such M, which maximizes the probability that exactly m out of n random passers-by speak Cantonese." What does it mean? Re: wtf? Vedernikoff 'Goryinyich' Sergey (HSE: АОП) 22 июн 2013 18:06 This means exactly what is written - for any possible M there is some probability that, when taken n people out of N, exactly m of them will speak Cantonese. You want to estimate M in a way to maximize that probability. This is called maximum likelihood approach in statistics. |
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