Year 12 2013 Chit Chat Thread (5 Viewers)

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Examine

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Re: Year 11 2012 Chit Chat Thread

Aysce said:
What were your previous marks?
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75-80% and 60% for one :/

They've separated it into people who are automatically in
People who need to get 85 to get in
And people who are just rejected

:(

So close but so far. Just need to study lots of maths for the next 2-3 weeks
 
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Re: Year 11 2012 Chit Chat Thread

Examine said:
75-80% and 60% for one :/

They've separated it into people who are automatically in
People who need to get 85 to get in
And people who are just rejected

:(

So close but so far. Just need to study lots of maths for the next 2-3 weeks
Click to expand...
so they only consider 3U?

So if a person who was in the 2nd category got:
- 70 for 2U
- 85 for 3U

while someone else got:
- 100 for 2U
- 84 for 3U

The first person is accepted and the second person gets rejected?
 
Aysce

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Re: Year 11 2012 Chit Chat Thread

Examine said:
75-80% and 60% for one :/

They've separated it into people who are automatically in
People who need to get 85 to get in
And people who are just rejected

:(

So close but so far. Just need to study lots of maths for the next 2-3 weeks
Click to expand...
What topics do you struggle with though? Yes focus on maths since your other subs won't really matter for year 12 I guess.
 
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Re: Year 11 2012 Chit Chat Thread

RivalryofTroll said:
so they only consider 3U?

So if a person who was in the 2nd category got:
- 70 for 2U
- 85 for 3U

while someone else got:
- 100 for 2U
- 84 for 3U

The first person is accepted and the second person gets rejected?
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Yup, 2u is not considered.

I'm thinking their plan is to make a really hard extension 1 test and were planning to put the people in the middle category out all along :( :cry: :(
 
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Re: Year 11 2012 Chit Chat Thread

Examine said:
Yup, 2u is not considered.

I'm thinking their plan is to make a really hard extension 1 test and were planning to put the people in the middle category out all along :( :cry: :(
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Wouldn't be too surprised if they did that. I mean the school wants more students getting an E4 in MX2, like how they want students getting a band 6 in every other sub, means they'll pick out the very best students.

My best advice is seriously, don't throw away marks. Making less unforced errors will make a BIG difference for whether you get 85+ or just miss out.
 
iBibah

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Re: Year 11 2012 Chit Chat Thread

Examine said:
Yup, 2u is not considered.

I'm thinking their plan is to make a really hard extension 1 test and were planning to put the people in the middle category out all along :( :cry: :(
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How many do they take for Ext 2?
 
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Re: Year 11 2012 Chit Chat Thread

iBibah said:
How many do they take for Ext 2?
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Not too sure.


Anyway I have yearlies in Week 9/10.

Probably just going to go all out on extension Maths and Advanced English.
 
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Re: Year 11 2012 Chit Chat Thread

How did everybody's yearlies go?

I got ranked first in General Maths and Economics, Advanced and Extention English...well let's not go there, ranked 2nd in Business Studies and I don't know about Legal or SOR yet.
 
theind1996

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Re: The Nonsense Thread

Maths > Sleep aye?

Can you help me out with this?

c)iv)

 
Carrotsticks

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Re: The Nonsense Thread

Jesus Christ why is that last one 3 marks!?? Where did you get this??

Also, 2 cases.

1. Tracey is on committee.

John can't be in it, and Tracey is already in it (by definition of the case), so we have 13 people (7 guys 6 girls) to choose from and 4 spots, so 13C4.

2. Tracey is NOT on committee.

We have 6 girls (since Tracey's not in it) and 8 guys to pick from, so total of 14 choices, and we have to pick 5. So 14C5.

So total is 13C4 + 14C5.

EDIT: Fixed typo in final solution.
 
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theind1996

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Re: The Nonsense Thread

Carrotsticks said:
Jesus Christ why is that last one 3 marks!?? Where did you get this??

Also, 2 cases.

1. Tracey is on committee.

John can't be in it, and Tracey is already in it (by definition of the case), so we have 13 people (7 guys 6 girls) to choose from and 4 spots, so 13C4.

2. Tracey is NOT on committee.

We have 6 girls (since Tracey's not in it) and 8 guys to pick from, so total of 14 choices, and we have to pick 5. So 14C5.

So total is 14C4 + 13C5.
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Why? Our school's paper.

And that's what I thought.

But answers says 15C5 - 13C3 = 2717.
 
Carrotsticks

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Re: The Nonsense Thread

theind1996 said:
Why? Our school's paper.

And that's what I thought.

But answers says 15C5 - 13C3 = 2717.
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Yep yep I had my working out right, but typed the "So the total etc etc" wrong, and you do indeed get 2717.

What they did was have the total (15C5) and presumably subtracted the cases when they are both on the same committee.
 
theind1996

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Re: The Nonsense Thread

Carrotsticks said:
Yep yep I had my working out right, but typed the "So the total etc etc" wrong, and you do indeed get 2717.

What they did was have the total (15C5) and presumably subtracted the cases when they are both on the same committee.
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Oh haha - thanks heaps :)

Why did you get so flustered at it being 3 marks?
 
Carrotsticks

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Re: Year 11 2012 Chit Chat Thread

Also, we just proved that 13C4 + 14C5 = 15C5 - 13C3



And a combinatoric argument is quite often very successful in proving Binomial Identities, but usually a more advanced technique.

theind1996 said:
Oh haha - thanks heaps :)

Why did you get so flustered at it being 3 marks?
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Because 3 marks is ridiculous for 1 line of working out. Would never happen in the HSC.
 
theind1996

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Re: Year 11 2012 Chit Chat Thread

Carrotsticks said:
Also, we just proved that 13C4 + 14C5 = 15C5 - 13C3



And a combinatoric argument is quite often very successful in proving Binomial Identities, but usually a more advanced technique.



Because 3 marks is ridiculous for 1 line of working out. Would never happen in the HSC.
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Lol you should see some of the other questions. http://i.imgur.com/uINuf.jpg
 
Carrotsticks

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Re: Year 11 2012 Chit Chat Thread

Solve using t formula.

8 marks.

I am bald.
 
Thief

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Re: Year 11 2012 Chit Chat Thread

I dont remember how to do the auxiliary angle method at all lol.

Could someone explain to me please Ch2E Q19 in yr12 3u cambridge? Like with all the steps and full working
 
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