A math problem - TennisForum.com
Old Jun 21st, 2011, 10:49 AM Thread Starter
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A math problem

I notice there're 7 british ladies in the MD, all non-seeds, and none of them was drawn with a seed in r1. What's the chances of that?

My calculation: there're 128 places, minus 32 seeds, then every non-seed have 64/96=2/3 chances to avoid a seed, for all 7 of them: 2/3^7=5.85%

Now I don't think my calculation is perfect, can someone better at it tell me how to solve this problem?

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Old Jun 21st, 2011, 10:55 AM
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Re: A math problem

Who cares? They should all just retire and open a florist shop together.
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Old Jun 21st, 2011, 11:02 AM
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Re: A math problem

Lol.. Not quite.. But it should be close.. 32 non seeds will always draw a seed. So total number of ways this can happen is 96C32 if 7 Brits are not to draw any seed then the 32 have to be chosen among remaining 89. So the number of ways is 89C32. Hence the probability is 89C32/96C32=64/96*63/95*...*58/90

Martina Hingis Ana Ivanovic Myskina Safarova

When I have my goals set, I always attain them- Justine
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Old Jun 21st, 2011, 11:03 AM
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Re: A math problem

(64 / 96) * (63 / 95) * (62 / 94) * (61 / 93) * (60 / 92) * (59 / 91) * (58 / 90) = 0.0521189831=5.21%

scheiß Fußball
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Old Jun 21st, 2011, 11:03 AM
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Re: A math problem

Quote:
Originally Posted by Svetlana))) View Post
Who cares? They should all just retire and open a florist shop together.

Martina Hingis Ana Ivanovic Myskina Safarova

When I have my goals set, I always attain them- Justine
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Old Jun 21st, 2011, 11:03 AM
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Re: A math problem

Old Jun 21st, 2011, 11:09 AM Thread Starter
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Re: A math problem

Thanks to Mirza and Lisicki! Are Germans all good at math?

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Old Jun 21st, 2011, 11:32 AM
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Re: A math problem

Quote:
Originally Posted by Drake Ramoray View Post
Thanks to Mirza and Lisicki! Are Germans all good at math?
To tell the truth: no - but there once was a good math education in Germany long ago, let's say in the year 1987 (apart from that: Mirza is a decent person of Indian origin, I will never ever forget his wonderful pics of Benesova from the abondoned tournament at Forest Hills some years ago).

This is not real sophisticated math, just stuff of a simple math sequence.

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Last edited by Nervenbuendel; Jun 22nd, 2011 at 01:09 AM.
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Old Jun 21st, 2011, 11:54 AM
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Re: A math problem

Quote:
Originally Posted by Nervenbuendel View Post
To tell the truth: no - but there once was a good math education in Germany long ago, let's say in the year 1987 (apart from that: Mirza is a decent person of Indian origin, I will never ever forget his wonderful pics of Benesova from the abondoned tournament in Forest Hills some years ago).

This is not real sophisticated math, just stuff of a simple math sequence.
Dankeschoen . They used to have some really good players at forest hills given how small it was..

Yeah and I am not German.. Just living in Germany nowdays

Martina Hingis Ana Ivanovic Myskina Safarova

When I have my goals set, I always attain them- Justine
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Old Jun 21st, 2011, 12:16 PM
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Re: A math problem

all draws are rigged to certain extent

and TV shows. one time i am watching Who Wants To Be A Millionaire and they guy said he liked Japan history, guess what!? he get a Q - 'What Do Kamikaze Mean'? what the chances!? before the show they test who will be good for the ratings and if they have someone on the show and the producers feel they is rubbish and people are losing interest they give them a question they is sure they dont not know the answer of

this is why no tennis draw is ever public, i know, i never ever seen one
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Old Jun 21st, 2011, 12:16 PM
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Re: A math problem

Quote:
Originally Posted by Lisickinator View Post
(64 / 96) * (63 / 95) * (62 / 94) * (61 / 93) * (60 / 92) * (59 / 91) * (58 / 90) = 0.0521189831=5.21%
this.
JJ Expres is offline
Old Jun 21st, 2011, 12:26 PM
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Re: A math problem

Quote:
Originally Posted by quote unquote View Post
all draws are rigged to certain extent

and TV shows. one time i am watching Who Wants To Be A Millionaire and they guy said he liked Japan history, guess what!? he get a Q - 'What Do Kamikaze Mean'? what the chances!? before the show they test who will be good for the ratings and if they have someone on the show and the producers feel they is rubbish and people are losing interest they give them a question they is sure they dont not know the answer of

this is why no tennis draw is ever public, i know, i never ever seen one
Svetlana))) is offline
Old Jun 21st, 2011, 12:41 PM
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Re: A math problem

Quote:
Originally Posted by quote unquote View Post
all draws are rigged to certain extent

and TV shows. one time i am watching Who Wants To Be A Millionaire and they guy said he liked Japan history, guess what!? he get a Q - 'What Do Kamikaze Mean'? what the chances!? before the show they test who will be good for the ratings and if they have someone on the show and the producers feel they is rubbish and people are losing interest they give them a question they is sure they dont not know the answer of

this is why no tennis draw is ever public, i know, i never ever seen one
Good luck with this logic.

Chances may be very slim and this is why it doesn't happen that often.

Pironkova.Petrova.Kerber.Schnyder. Stosur.Jankovic.Kuznetsova.Kostova.Sevastova.

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eDonkey is offline
Old Jun 21st, 2011, 12:44 PM Thread Starter
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Re: A math problem

I think this isn't a big deal comparing with the Isner-Mahut reunion!

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┏┛李娜┣┫·科娃┣┫·郑洁┣┫·伊万┣┫·彭帅┣┫·杨科┃
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Boxuan is offline
Old Jun 21st, 2011, 12:45 PM
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Re: A math problem

True High chance that that match is rigged

Martina Hingis Ana Ivanovic Myskina Safarova

When I have my goals set, I always attain them- Justine
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