Q12 (2 Viewers)

[Rafy]

Share and discuss your solutions here

 

[Barneyivan]

I couldn't get the parametrics?! and I'm pretty good at parametrics

 

[kliro_10]

what did you guys get for c

 

[TheOptimist]

for c) i) did you guys put the probabilty as 2/5?
ii) and i'm pretty sure we will get cfm if we used the wrong probability in i)

 

[Nooblet94]

I couldn't get the parametrics?! and I'm pretty good at parametrics

For the parametrics you use Pythagoras' theorem to express y in terms of k and t, then it comes out from there.

 

[TheOptimist]

haha awesome actually got the probability one ,
and I can reasure you Noobltet94's answers are correct

 

[RishBonjour]

I did gradient for parametrics--> perpendicular, equate to -1 and you get your answer

fmlll. thank god for carry through error. got 1/5 for probability.

 

[cartoonmaiz]

Can you write the domain in bi) as being equal to and greater than 3/4? Also, if you got the probability wrong in the first part of ci) can you still get the 2 marks for ii) if you did the working correctly?

 

[cartoonmaiz]

^ I was told by my teacher that you will be marked wrong for cii) if you got i) wrong...

 

[Nooblet94]

^ I was told by my teacher that you will be marked wrong for cii) if you got i) wrong...

That seems quite harsh. I'm not sure though. And yes, it should be equal to as well, just a typo.

EDIT: Fuck, on second consideration, I might've just put > in the exam. :'(

 

[nucgaek]

^ I was told by my teacher that you will be marked wrong for cii) if you got i) wrong...

I don't know about what your teacher's saying, but if your working makes sense and it doesn't make the question easier, you'll get the marks.

 

[Timske]

oh thank god i got =>

 

[HeroicPandas]

I did gradient for parametrics--> perpendicular, equate to -1 and you get your answer

fmlll. thank god for carry through error. got 1/5 for probability.

:O gradients, nice! never thought of that

 

[kenkap]

for probability i got 1/3 ??? what was i thinking???

 

[freeeeee]

For the parametrics you use Pythagoras' theorem to express y in terms of k and t, then it comes out from there.

for b(i) isnt the asnwer
x is greater than or equal to 3/4?

Apart from that same as you =D

 

[simskee]

for b(i) isnt the asnwer
x is greater than or equal to 3/4?

Apart from that same as you =D

yeh, it should be greater or equal to 3/4

 

[mike12345678]

probability question

hey guys this is what i did for the probability.

i said the P(draw)= 1/5x 1/5 = 1/25
so therefore P(win) = 1/2 - 1/25 = 23/50
(1 mark)



so for the next part i did '

(23/50 + 27/50)^6

P(wins 3 games) = 6C3 (23/50)^3 (27/50)^3

(worth 2 marks)

my question is will i get any marks at all for either question ??

 

[Illest]

Re: probability question

You'll definitely get the second part right, since you used the correct method and even if your first part is wrong you'll still get carry on marks. And if you got i) correct then you get full marks. I'm not sure what the correct answer is though for part i

 

[RishBonjour]

Re: probability question

You'll definitely get the second part right, since you used the correct method and even if your first part is wrong you'll still get carry on marks. And if you got i) correct then you get full marks. I'm not sure what the correct answer is though for part i

according to terry lee and lost other people, its 2/5

I got 1/5
hopefully carry through error, or I'm dead

 

[Sindivyn]

Re: probability question

Part i is wrong, part ii has correct follow through though so you'll still get 2 marks. There was no need for product rule (1/2 - 1/5 would've given you the answer).