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Maths HL Paper 2
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That's a mess, and completely wrong, despite the correct answer. There are 6! ways for the 2nd bit, and 6.6! for the first.Yes the 6(c) Q is definitely 6.
I drew out diagrams, complete with stick men:p Made it much easier.
There are 11 seats;
O O O O O O O O O O O
There are 6 people;
:):):):):)
P(E) = Favourable Outcomes
Total Outcomes
There is only 1 way they can all be apart;
I O I O I O I O I O I
Total Outcomes = 11C6
= 462
P(E) = 1/462
And there's 6 ways they can all be beside each other;
I I I I I I I O O O O O
O I I I I I I O O O O
O O I I I I I I O O O
O O O I I I I I I O O
O O O O I I I I I I O
O O O O O I I I I I I
P(E) = 6/462
Therefore
(1/462) : (6/462)
6 times as likely!0 -
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Yes the 6(c) Q is definitely 6.
I drew out diagrams, complete with stick men:p Made it much easier.
There are 11 seats;
O O O O O O O O O O O
There are 6 people;:):):):):)
P(E) = Favourable Outcomes
Total Outcomes
There is only 1 way they can all be apart;
I O I O I O I O I O I
Total Outcomes = 11C6
= 462
P(E) = 1/462
And there's 6 ways they can all be beside each other;
I I I I I I I O O O O O
O I I I I I I O O O O
O O I I I I I I O O O
O O O I I I I I I O O
O O O O I I I I I I O
O O O O O I I I I I I
P(E) = 6/462
Therefore
(1/462) : (6/462)
6 times as likely!
For them being all apart there is more than one way.
AOBOCODOEOF
BOCODOEOFOA
CODOEOFOAOB
and so on, so there is 6 possibilities for the first seat, 5 for the third, 4 for the 5th, 3 for the 7th, 2 for the 9th and 1 for the last which gives 6!
For all blank seats in that case there is only 1 possibility so really the answer for that is 1.6! which is obviously just 6!
And likewise for them being together. Instead of using all I's to represent the people, you need to represent them using different letters which can change. Which as pointed out before will give you 6.6!0 -
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roll on summer 10! wrote: »I got that and then said that OC = CR therefore C was the midpoint of OR therefore collinear, was kinda winging it!
If it's the midpoint then it is on the line OR so your right Anyone have trouble changing from capital to non in Q2? I know some people did but I thought it was okay. 0 -
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blacklionboy wrote: »I got x^2+y^2= 20 but im sure its wrong!
I got that too and I did it out three times
Overall I thought it was alright, few iffy questions that stumped me but it could have been worse. Checked my answers with some here and a lot of them are the same. So feeling better than I did in school anyway : )0 -
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citizenerased1 wrote: »God theres some gloating people here....
it was a grand paper i thought
ironic about the probability (Eavan Boland anyone)
Haha, saw that and had a little giggle
Didn't do that question though.
Think the SEC were up to a bit of mischief this year
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citizenerased1 wrote: »God theres some gloating people here....
it was a grand paper i thought
ironic about the probability (Evan Boland anyone)
haha, i was thinking the same when answering that question!
it was an alright paper overall, paper 1 was still easier though.
trig Q4. part c was a bit dodgey imo. meh.
anyway, maths all done and dusted! 0 -
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*jumps on bandwagon*
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