stuffing up perms/combs/prob questions (1 Viewer)

[conics2008]

Hey guys, through my time studying ext 1 and ext2.. I find those topics prob in particular to be the most confusing..

I know how to prove identies in perms/combs.. but when it comes to probabilty... I screw it.. the only question i get wrong in my exam papers are the stupid prob/perms and sometimes comb questions..


Can some one help me out here.. what are the "FACTS" I should know to ace the question relating to these questions. Thanks in advance..

PS: I have no trouble with the other topics only this topic.. Losing 4-5 marks can make a difference...

 

[lolokay]

can you post an example of a question that you find confusing? In general, for probability just find the probability of one case of a certain event occuring, and multiply by the number of ways it can happen.

 

[conics2008]

lolokay :::

what im saying is the wording.. can you explain to me the wordings..

what does least/greater etc etc.. because i have exam tomorrow.. and the probabilty questions are soo confusing.

 

[conics2008]

in other words.. tips ...

like as in in a straight line.. circle.. perms wtf are these.. combs i think im fine.. but when i get to part ii or iii i dont get wat their saying.

 

[tacogym27101990]

yeah so just post up a question where you dont understand the wording and we'll explain it to you

 

[lolokay]

I haven't done enough questions to give you good general tips, or what type of questions usually come up. Just use logic to figure out when to multiply or divide by a factorial, or n, or whatever else. If you post up some questions maybe I could help more.