Methods (CAS) 2009 exam 2 Suggested Solutions.

[homghomg1]

So TT do you agree about the interpretation of 3cii?

Well itute solutions are up and they did it my way:
so yeah I'm not not sure myself now...

yeah, was just gonna say that itute got same answer as you

I have to say I agree with NE2000 though, because there are two requirements. The balls had to fit in the tin and be outside the desired range, not JUST the latter. So you had to use the conditional probability calculated in part c) i), which was the probability that the balls are within the desired range given they can fit in the tin. 1 -[Answer to part i] is the probability that the balls are outside the desired range given they can fit in the tin.

[coonoo]

How about forgetting "years" (after n=8) for question 4 something?

Any comments...

[angelboykevin]

just wondering is the solution on 3cii correct?

[TrueTears]

So TT do you agree about the interpretation of 3cii?

Well itute solutions are up and they did it my way:
so yeah I'm not not sure myself now...

yeah, was just gonna say that itute got same answer as you

I have to say I agree with NE2000 though, because there are two requirements. The balls had to fit in the tin and be outside the desired range, not JUST the latter. So you had to use the conditional probability calculated in part c) i), which was the probability that the balls are within the desired range given they can fit in the tin. 1 -[Answer to part i] is the probability that the balls are outside the desired range given they can fit in the tin.

True, but it still comes down to interpretation, the question never said given that they fit, it just said a tin of 4 balls.

[homghomg1]

just wondering is the solution on 3cii correct?

It's being discussed
But I think it's wrong, should be 0.3482

[anti]

So TT do you agree about the interpretation of 3cii?

Well itute solutions are up and they did it my way:
so yeah I'm not not sure myself now...

yeah, was just gonna say that itute got same answer as you

I have to say I agree with NE2000 though, because there are two requirements. The balls had to fit in the tin and be outside the desired range, not JUST the latter. So you had to use the conditional probability calculated in part c) i), which was the probability that the balls are within the desired range given they can fit in the tin. 1 -[Answer to part i] is the probability that the balls are outside the desired range given they can fit in the tin.

True, but it still comes down to interpretation, the question never said given that they fit, it just said a tin of 4 balls.

So the balls are in the tin yes?  It specifies the size they need to be to fit in a tin so we can presume that they are less than or equal to that size.

[angelboykevin]

just wondering is the solution on 3cii correct?

It's being discussed
But I think it's wrong, should be 0.3482

cos itute solution got the same answer as TT did,but i think they wrong

[TMitch]

how do u manage to get these exam right after the exam? that more intriguing than the solutions themselves.

Walk up to examiner, ask examiner for copy, walk bak off. I beared witness to it myself. It was fukn amazing.
God Amen what?

I made the attempt at Exam 2 for spec and methods and exam 1 for methods and got turned away both times. The examiner said they aren't allowed to give the copies to anyone but the VCE co-ordinator which is a load of bull considering the exam is done and it's not gonna help anybody

TT was very persuasive, I could have written a 1000 word essay on all the persuasive techniques he used to get his hands on the vcaa paper.

At first the examiner wouldnt let him get the paper so he started beseeching the examiners castle with his sword. He then proceeded to prithee that the examiner doth alloweth him to taketh the exam only in ordereth to useth it forth the ability to posteth it onlineth for sultionth. After hearingeth the reason the examiner doth findethed TT's persuasive skills too persuasive and was for him. Thus TT was able to get the vcaa exam paper.

Btw: The examiners at our skool were VERY nice, they gave TT the paper each time and seemed really friendly and cute, I wanted to hug the old guys.

You struggle to speak ye olde english

[Over9000]

how do u manage to get these exam right after the exam? that more intriguing than the solutions themselves.

Walk up to examiner, ask examiner for copy, walk bak off. I beared witness to it myself. It was fukn amazing.
God Amen what?

I made the attempt at Exam 2 for spec and methods and exam 1 for methods and got turned away both times. The examiner said they aren't allowed to give the copies to anyone but the VCE co-ordinator which is a load of bull considering the exam is done and it's not gonna help anybody

TT was very persuasive, I could have written a 1000 word essay on all the persuasive techniques he used to get his hands on the vcaa paper.

At first the examiner wouldnt let him get the paper so he started beseeching the examiners castle with his sword. He then proceeded to prithee that the examiner doth alloweth him to taketh the exam only in ordereth to useth it forth the ability to posteth it onlineth for sultionth. After hearingeth the reason the examiner doth findethed TT's persuasive skills too persuasive and was for him. Thus TT was able to get the vcaa exam paper.

Btw: The examiners at our skool were VERY nice, they gave TT the paper each time and seemed really friendly and cute, I wanted to hug the old guys.

You struggle to speak ye olde english

I prithee thou dost do a better job than thyself?

[TMitch]

Nah mate, just messing, thou speaketh ye olde english with thine finest decorum...or something like that. Dont want to say what i got, got pumped, was so brain dead by the end didnt realise i missed the page about finding v in terms of w

[patrickthai]

Yes i got an A+ thanks TT for beforehand with my first post on this forum fkn got A+ on this shit!

[Politik23]

How about forgetting "years" (after n=8) for question 4 something?

Any comments...

I didn't include 'years' in my answer either.
As it asked for the "value" of n, I'd say that stating n = 8 should be fine.

[nem0]

The answer to 3cii comes down to personal interpretation. 3ci says 'a' ball is selected but 3cii says 'one of these balls' so you would have to use the answer found in b. the desired range already accounts for 'fitting' in the tin since it is lower than 68.5. I don't know if my reasoning is entirely correct.

[Over9000]

So TT do you agree about the interpretation of 3cii?

Well itute solutions are up and they did it my way:
so yeah I'm not not sure myself now...

yeah, was just gonna say that itute got same answer as you

I have to say I agree with NE2000 though, because there are two requirements. The balls had to fit in the tin and be outside the desired range, not JUST the latter. So you had to use the conditional probability calculated in part c) i), which was the probability that the balls are within the desired range given they can fit in the tin. 1 -[Answer to part i] is the probability that the balls are outside the desired range given they can fit in the tin.

True, but it still comes down to interpretation, the question never said given that they fit, it just said a tin of 4 balls.

So the balls are in the tin yes?  It specifies the size they need to be to fit in a tin so we can presume that they are less than or equal to that size.

Thats stupid, what if they squashed the shit out of the balls and put them in the tin, they sed they had 4 balls in a tin. They never sed 4 balls that fit in a tin.

[rohanftw]

So TT do you agree about the interpretation of 3cii?

Well itute solutions are up and they did it my way:
so yeah I'm not not sure myself now...

yeah, was just gonna say that itute got same answer as you

I have to say I agree with NE2000 though, because there are two requirements. The balls had to fit in the tin and be outside the desired range, not JUST the latter. So you had to use the conditional probability calculated in part c) i), which was the probability that the balls are within the desired range given they can fit in the tin. 1 -[Answer to part i] is the probability that the balls are outside the desired range given they can fit in the tin.

True, but it still comes down to interpretation, the question never said given that they fit, it just said a tin of 4 balls.

So the balls are in the tin yes?  It specifies the size they need to be to fit in a tin so we can presume that they are less than or equal to that size.

Thats stupid, what if they squashed the shit out of the balls and put them in the tin, they sed they had 4 balls in a tin. They never sed 4 balls that fit in a tin.

Plus they didn't state which type of tin! Could have been some massive tin. But yeah I'm gonna assume I got that wrong then, if it's in the tin, then it fits in the tin.