Section II (3 Viewers)

[timw7845]

No i dont think they did

1st one had 2/100 2nd had 1/10000 didnt they :S

 

[jamesjoker]

1st one had 2/100 2nd had 1/10000 didnt they :S

that's what i wrote .. i think for a 4 marker, there was more too it than that though

 

[Bootawa_Boy]

1st one had 2/100 2nd had 1/10000 didnt they :S

are you sure cause it said chance of winning 1 prize isnt that chance of winning both?

 

[Question?]

fuckkk i didnt fully simplify 25a . - still get one mark if i wrote -2x - 9 ?

you dont simplify completely there was no equals sign

 

[Bootawa_Boy]

you dont simplify completely there was no equals sign

thats what i thought

 

[Gypo09]

Not fully simplified. x= -4.5

i don't get what you mean by it not being fully simplified??? sorry my brain has turned to much could you perhaps show me your working??

 

[Question?]

couldnt concentrate. one of the examiners was trying to discretely pick their noes, an owl was hooting outside, and this stupid fag across from me was breathing harder then my dog after hes been runnibg around for 2 hours,

all in all, it suked.

and i got 17.8 k for 28 C. yeah pretty sure that questions wrong,
and their was way to much probablity (of which my knowlegde is very limited)

lmao man i feel sorry for ya it was shittt. i did get 17.8 aswell

 

[Bootawa_Boy]

i don't get what you mean by it not being fully simplified??? sorry my brain has turned to much could you perhaps show me your working??

I thought it went 5-2(x+7)5-2x-14-2x-9Then you could take it further but it did not ask for wat x =

 

[rowdyroddy]

i didn't realise the part c and d of 28 on the back page.

lol! did you not see the question 28 continues next page

 

[rowdyroddy]

fuckkk i didnt fully simplify 25a . - still get one mark if i wrote -2x - 9 ?

i wrote that down then i simplified next line, so at least a mark either way

 

[lukadore]

Not fully simplified. x= -4.5

actually... i'm pretty sure it can't be simplified past -2x-9

 

[Question?]

actually... i'm pretty sure it can't be simplified past -2x-9

yes it cant unless i left it that way unless. -2x = 9 therefore x= -4.5

 

[lukadore]

WTF 27 c about the tickets why was it 4 marks didnt they have equal chance of winning anyway?

i'm not 100% about this. but... i thought they had equal chance too, but then i did a tree diagram and realised Mary had a 2/100 chance, where as Jane had 199/10000 chance. miniscule difference, but it'll cost you marks, unfortunately. and i established 199/10000 by 1/100x99/100x2 + 1/100x100 = 199/10000 anyone agree/disagree?

 

[mystiques4]

i'm not 100% about this. but... i thought they had equal chance too, but then i did a tree diagram and realised Mary had a 2/100 chance, where as Jane had 199/10000 chance. miniscule difference, but it'll cost you marks, unfortunately. and i established 199/10000 by 1/100x99/100x2 + 1/100x100 = 199/10000 anyone agree/disagree?

I got exactly that I did it via tree-diagram as well. 25.b microbes, i got something like 1 x 10 ^ -7

 

[Gypo09]

yes it cant unless i left it that way unless. -2x = 9 therefore x= -4.5

it doesnt have an = sign and so can not be simplified any further. Its an expression not an equation

 

[Question?]

i'm not 100% about this. but... i thought they had equal chance too, but then i did a tree diagram and realised Mary had a 2/100 chance, where as Jane had 199/10000 chance. miniscule difference, but it'll cost you marks, unfortunately. and i established 199/10000 by 1/100x99/100x2 + 1/100x100 = 199/10000 anyone agree/disagree?

not sure i had mary at 1/50 and jane at P 1-(NO WIN) = 1-99/100 x 99/100 which had mary winning by 0.1%

 

[matttayl]

you dont simplify completely there was no equals sign

yeah ive never had to take a question down that far, im pretty sure the right answer is -2x - 9.

 

[lukadore]

I got exactly that I did it via tree-diagram as well. 25.b microbes, i got something like 1 x 10 ^ -7

sweet. my brother says we're right. good job!!! 25.b. i'm not sure about, but i got one microbe = 2 x 10^-5 .. anyone else have an idea?

 

[Bootawa_Boy]

sweet. my brother says we're right. good job!!! 25.b. i'm not sure about, but i got one microbe = 2 x 10^-5 .. anyone else have an idea?

Thats what i got for microbes

 

[lukadore]

also. the last question was in my opinion the hardest. i said juan was correct, because there were 8 differences between the theoretical probability and the first experiment, where as there were only 4 differences between the theoretically probable answer and experiment two... what did everyone else get, and what were your explanations?