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March 21, 2026, 05:54:34 am
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Author Topic: Exam 1 Answers  (Read 22595 times)  Share 

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Collin Li

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Exam 1 Answers
« Reply #45 on: November 09, 2007, 11:05:48 am »
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Quote from: "Daniel15"
I think if they're mutually exclusive, then Pr(A' ∩ B) = Pr(A') * Pr(B).


That's actually for independent events, I believe.
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Ahmad

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« Reply #46 on: November 09, 2007, 11:08:54 am »
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Draw the appropriate venn diagrams, makes things much easier! :)

Check it out here

Pr(A' AND B) = Pr(B) - Pr(A AND B)
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The collage of ideas. The music of reason. The poetry of thought. The canvas of logic.

maxleng

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« Reply #47 on: November 09, 2007, 11:10:51 am »
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for the last q, i did something completly different,

what i did: drew the graph, and then the line pasing thru the origin, and reasoned that they were perpindicular, found the gradient of y then found the gradient of normal.. y=mx, got a triangle out of it, then attempted to find the hypotunuse...

lol would i get ANY marks for that Q, i hope i can at least get 1  :?

edit: ven diagrams make it SO much easier
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Daniel15

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Exam 1 Answers
« Reply #48 on: November 09, 2007, 11:13:01 am »
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Quote from: "coblin"
Quote from: "Daniel15"
I think if they're mutually exclusive, then Pr(A' ∩ B) = Pr(A') * Pr(B).


That's actually for independent events, I believe.

Oops, my bad.
That's what I get for not studying probability in much detail...  :oops:
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Estimate your ATAR (ENTER)! VCE ATAR Calculator

2005: Cisco CCNA Units 1+2
2006: Info Systems [39 → 36.93]
2007: Specialist [33 → 43.13], Methods [39 → 44.48], Physics [34 → 37.38], English [23 → 19.91], Chem [26]
ENTER: 84.95

2008-2011: Professional Software Development, Swinburne Uni.

Collin Li

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« Reply #49 on: November 09, 2007, 11:15:47 am »
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Better late for Exam 1 than late for Exam 2 :)
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maxleng

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« Reply #50 on: November 09, 2007, 11:25:54 am »
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Quote from: "JohnS"
For 10, k=3/2, not 2/3


i wrote k= 81/54

had no idea that was 3/2 lol, will i still get the mark??
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Matt89

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« Reply #51 on: November 09, 2007, 11:26:30 am »
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Does anyone think they got a 40/40?
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Daniel15

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« Reply #52 on: November 09, 2007, 11:30:34 am »
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Quote from: "Matt89"
Does anyone think they got a 40/40?

I always make stupid mistakes. Most smart people I know make stupid mistakes.
I don't think anyone I know would get 40/40 :P
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Estimate your ATAR (ENTER)! VCE ATAR Calculator

2005: Cisco CCNA Units 1+2
2006: Info Systems [39 → 36.93]
2007: Specialist [33 → 43.13], Methods [39 → 44.48], Physics [34 → 37.38], English [23 → 19.91], Chem [26]
ENTER: 84.95

2008-2011: Professional Software Development, Swinburne Uni.

kido_1

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« Reply #53 on: November 09, 2007, 11:36:12 am »
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I was hoping for a 40.

Now I am looking at 38/39. (Probably 38

Silly mistakes suck.!!!
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oping for an ENTER of 99+

Toothpaste

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« Reply #54 on: November 09, 2007, 11:43:06 am »
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Quote from: "kido_1"
I was hoping for a 40.

Now I am looking at 38/39. (Probably 38

Silly mistakes suck.!!!


me too.
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hifer

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« Reply #55 on: November 09, 2007, 11:47:08 am »
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Quote from: "kido_1"
I was hoping for a 40.

Now I am looking at 38/39. (Probably 38

Silly mistakes suck.!!!


lol same here.. dun u just hate it when u make simple mistakes ><
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kido_1

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« Reply #56 on: November 09, 2007, 11:49:18 am »
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Quote from: "hifer"
Quote from: "kido_1"
I was hoping for a 40.

Now I am looking at 38/39. (Probably 38

Silly mistakes suck.!!!


lol same here.. dun u just hate it when u make simple mistakes ><


What are you looking at getting?

Btw, do you go to TSFX, bcz I go there too...
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oping for an ENTER of 99+

Timtasticle

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« Reply #57 on: November 09, 2007, 11:49:33 am »
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Nothing's worse then my stupid mistake on the related rates qn.

8/6sqrt(4) = 8/24

AAHHHHHHHH I'm a spud.
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bilgia

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« Reply #58 on: November 09, 2007, 11:54:00 am »
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Quote from: "kido_1"
Quote from: "hifer"
Quote from: "kido_1"
I was hoping for a 40.

Now I am looking at 38/39. (Probably 38

Silly mistakes suck.!!!


lol same here.. dun u just hate it when u make simple mistakes ><


What are you looking at getting?

Btw, do you go to TSFX, bcz I go there too...


tell me about it...
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My Subjects:
2006 I.T Systems --> 42
2007 English --> 40
         Methods --> 41
         Spec --> 38
         Chem --> 36
         Physics --> 37
         Unimaths --> 5.5

ENTER: 97.35


                   



 

hifer

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« Reply #59 on: November 09, 2007, 12:11:35 pm »
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Quote from: "kido_1"
Quote from: "hifer"
Quote from: "kido_1"
I was hoping for a 40.

Now I am looking at 38/39. (Probably 38

Silly mistakes suck.!!!


lol same here.. dun u just hate it when u make simple mistakes ><


What are you looking at getting?

Btw, do you go to TSFX, bcz I go there too...


umm probably 39.. since i lost 1 stupid mark on q10.. didn't simplify properly >< ya i go to TSFX, but not for methods anymore coz i went there for unit 3 and found it a waste of time..
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