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%    
07.06.2015, 23:48
 Forum Legend   Join Date: Oct 2014 Location: Ostschweiz
Posts: 3,516
Groaned at 119 Times in 96 Posts
Thanked 4,602 Times in 2,321 Posts
  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 n2n90=0.
The exercise is not solvable due to insufficient or contradicting information 
09.06.2015, 15:30
  Forum Legend   Join Date: Oct 2009 Location: Basel
Posts: 11,692
Groaned at 247 Times in 158 Posts
Thanked 13,682 Times in 5,805 Posts
  Re: A mathematical Friday Thread  Quote:      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?!

09.06.2015, 16:16
  Senior Member   Join Date: Dec 2013 Location: Zurich
Posts: 482
Groaned at 8 Times in 6 Posts
Thanked 338 Times in 204 Posts
  Re: A mathematical Friday Thread  Quote:      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.

09.06.2015, 16:19
  Forum Veteran   Join Date: Jan 2015 Location: Earth
Posts: 545
Groaned at 31 Times in 21 Posts
Thanked 793 Times in 364 Posts
  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. 
09.06.2015, 16:35
  Forum Legend   Join Date: Mar 2008 Location: Zurich
Posts: 8,540
Groaned at 145 Times in 124 Posts
Thanked 15,191 Times in 6,465 Posts
  Re: A mathematical Friday Thread  Quote:      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.

09.06.2015, 16:43
  Forum Legend   Join Date: Apr 2010 Location: Democratic Republic Kenistan
Posts: 10,271
Groaned at 350 Times in 285 Posts
Thanked 18,564 Times in 7,057 Posts
  Re: A mathematical Friday Thread  Quote:      Nobody's solved this yet?!      640k give or take.

09.06.2015, 16:53
  Forum Legend   Join Date: Oct 2009 Location: Basel
Posts: 11,692
Groaned at 247 Times in 158 Posts
Thanked 13,682 Times in 5,805 Posts
  Re: A mathematical Friday Thread  Quote:      Fixed the question for you.      that's the 2016 edition!

09.06.2015, 16:59
  Forum Veteran   Join Date: Jul 2014 Location: Basel
Posts: 810
Groaned at 24 Times in 15 Posts
Thanked 1,723 Times in 632 Posts
  Re: A mathematical Friday Thread  Quote:      Nobody's solved this yet?!      791,800 GBP.
The expected value of the geometric distribution E(X)=∑ ∞ n=1 npq^n−1 = 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.

09.06.2015, 18:05
  Forum Legend   Join Date: Jan 2010 Location: Baden
Posts: 4,449
Groaned at 25 Times in 23 Posts
Thanked 6,018 Times in 2,738 Posts
  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. 
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)   Thread Tools   Display Modes  Linear Mode 
Posting Rules
 You may not post new threads You may not post replies You may not post attachments You may not edit your posts HTML code is Off    All times are GMT +2. The time now is 14:45.  