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View Poll Results: So, who can solve the question?
Yes, I can solve it, call me Einstein 12 70.59%
No, I can't solve it, but I'm more of a big picture person anyway 5 29.41%
Voters: 17. You may not vote on this poll

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  #41  
Old 07.06.2015, 23:48
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Re: A mathematical Friday Thread

It's all about language. Which is why you've all got it wrong

"Random" is mentioned for the 2nd draw. This implies that, if the 1st draw were random too, it would have been mentioned as well. Alas it wasn't, and thus the 1st draw was not random, which in turn means it'd kind of difficult to explain n2-n-90=0.

The exercise is not solvable due to insufficient or contradicting information
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  #42  
Old 09.06.2015, 15:30
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Re: A mathematical Friday Thread

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for those wanting more of a challenge, here is the GCSE question from Phil_MCR's exam paper:

"aliyah and amina are two lesbian illegal immigrants. assuming under the human rights act, they can claim free IVF treatment costing 3000 per attempt and the probability of success is 30% per attempt. they can attempt to have a treatment once every 6 months and no treatment for a year after a successful attempt (from start of treatment).

during this time they get free housing costing 2000 per month and ancillary support services, free transport etc. of 300 per week.

once a child is born, they will receive support of 200 per month for the first child and 150 per month for each subsequent child.

they want to have two chilren.

assuming that only one child is born at a time, calculate the expected cost to the tax payer until the youngest child reaches the age of 16.

(12 marks)"

i obviously missed my calling as an maths exam paper writer.

That's MathNut's Friday evening sorted!
Nobody's solved this yet?!
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  #43  
Old 09.06.2015, 16:16
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Re: A mathematical Friday Thread

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Nobody's solved this yet?!
The last time I checked the papers, no. They were all discussing it in Brussels, as far as I know.
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  #44  
Old 09.06.2015, 16:19
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Re: A mathematical Friday Thread

The idea that Asians (in Japan, India, China, Korea) are that great isn't all that. On paper they look great until you get them in your class/research group, and then you struggle with them because they can't speak or write a paper, let alone a master or PhD thesis, despite their brilliantly solving for x or y. They come with a robotic work ethic - great in certain environments, but they aren't ingenious.

When these Asians live their lives in the West, their progenies get integrated.
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  #45  
Old 09.06.2015, 16:35
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Re: A mathematical Friday Thread

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for those wanting more of a challenge, here is the GCSE question from Phil_MCR's exam paper:

"aliyah and amina are two lesbian illegal immigrants. assuming under the human rights act, they can claim free IVF treatment costing 3000 per attempt and the probability of success is 30% per attempt. they can attempt to have a treatment once every 6 months and no treatment for a year after a successful attempt (from start of treatment).

during this time they get free housing costing 2000 per month and ancillary support services, free transport etc. of 300 per week.

once a child is born, they will receive support of 200 per month for the first child and 150 per month for each subsequent child.

they want to have two chilren.

underline the word lesbian and draw a picture of a unicorn (30 points)
Fixed the question for you.
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  #46  
Old 09.06.2015, 16:43
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Re: A mathematical Friday Thread

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Nobody's solved this yet?!
640k give or take.
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  #47  
Old 09.06.2015, 16:53
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Re: A mathematical Friday Thread

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Fixed the question for you.
that's the 2016 edition!
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  #48  
Old 09.06.2015, 16:59
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Re: A mathematical Friday Thread

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Nobody's solved this yet?!
791,800 GBP.

The expected value of the geometric distribution E(X)= n=1 npq^n1 = 3 and I assumed the pregnancy was detected 1 month after treatment and that the nominal 9 month gestation period for you humans was appropriate.
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  #49  
Old 09.06.2015, 18:05
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Re: A mathematical Friday Thread

I couldn't solve it, mind you it's hundreds of years since I did O level maths.

I watched this and just about understood..

https://m.youtube.com/watch?v=N980VBpu3OE

What I am more concerned with though, is what my niece is doing eating sweets before her dinner.
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