Mathematics Advanced Predictions/Thoughts (2 Viewers)

WeiWeiMan

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tutor01 said:
For Q31(c), it seems you need to assume that the four students are mutually independent with respect to their availability on next Saturday night. I don't think was able to be deduced from what is given in the question. Given that part (a) was all about independence with respect to availability next Friday and Saturday night for a particular student, you would think it's even more important than normal to state that the four students are independent from each other with respect to their availability (if that indeed was what was supposed to be assumed).

One scenario could be that all four students are best friends and always go out together (if they do go out) on Friday and/or Saturday nights. All the probabilities given earlier in the question could still apply. If that were the case, then the probability that at least one is not available next Saturday would be 1/5. This is clearly different to what I think was intended, namely 1-(4/5)^4.

Do you agree? Or is this question just fine as it is and I'm wrong?
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Advanced was on Monday and I rly don’t like advanced but I think I got the same answer as you
 
AsuTeksu

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jyu

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user08920 said:
no you round down because the question asked how many koalas weigh more than 11.93kg. so there were 36 whole koalas above 11.93 and then you don't consider the .72 because that's not a whole koala if you get what i'm saying. normally, yes you would round up, but in this case you wouldn't because of the question. hope that helps.
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Calculate how many would be expected to weigh less than 11.93 kg by using the above reasoning, the answer would be 363. If 36 were more than 11.93 kg, where/what was the missing koala?
 
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tywebb

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Big_Kev said:
marking guidelines - they accepted both 36 & 37 koalas!!!
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They seem to have released the mg's for advanced maths and standard maths prematurely.

The link still works but if you look at https://educationstandards.nsw.edu..../2023/mathematics-advanced-2023-hsc-exam-pack you will see the link has been removed.

Screen Shot 2023-10-26 at 1.49.44 pm.png


Same for the standard maths ones.

They may update them after marking is finished so if you downloaded it before, maybe download again when it goes up again.
 
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tywebb

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Big_Kev said:
marking guidelines - they accepted both 36 & 37 koalas!!!
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Your link has now gone dead.

You may now find an updated version at https://educationstandards.nsw.edu..../2023/mathematics-advanced-2023-hsc-exam-pack

mg back.png
There are also updated versions of the Standard 1 and 2 mgs at https://educationstandards.nsw.edu....standard-2023-hsc-exam-pack++++++++++++++++++ which have likewise re-appeared.

The Extension 1 and 2 mgs are not up yet though.
 
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