Last Question Probability and Combinatorics

[frog0101]

Hi,
Does anyone have any tips for the last questions in the HSC Mathematics Extension 1 that are probability or combinatorics? Is there any general rule of thumb to get the maximum marks out of a probability question or figure out the method they are using (or bluff??)?

Thanks

[Opengangs]

I'd personally just expose to as many different variants they can throw at us. Also, I'd like to also expose myself to harder 3u content from the 4u papers just 'cause I can cover the scope of the 3u.

Some that I think you should attempt: (I'll update this when I find some interesting questions)
2015 Q14 c)
Link

2014 Q14 b)
Link

2011 Q6 c)
Link

2010 Q7 c)
Link

[frog0101]

Thanks Opengangs