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$ You are given $ P(B) = 0.65, P(B|A) = 0.95, P(B^c|A^c) = 0.85. $ Find $ P(A).

Thanks Integrand for saving my maths 1B :') and thanks everyone else who helped the exams tomorrow I hope I can get good for all the effort you guys put in for me :) I may have a few more questions and then thats it. (May also make a discrete maths forum but I went to most of my lectures so...

Okay that makes sense now thank you :P

Im just thinking the last row is going to be all zeros... So confused right now

So do I T(<1,0,0,0>) , T(<0,1,0,0>), T(<0,0,1,0>) as the columns ?

But arn't we putting in a vector from P_2 and getting out a vector from P_3 ? If we have a 4x3 matrix then that says we are putting in a vector from P_3?

But didn't we say the Im(T) = 2 and the nullity = 1 ?

Or 0 1 0 -2 0 2 0 -1 0 ?

BTW: Would the matrix be 0 1 -2 0 0 -1 theres no answers so am really not sure.

Yes that was my question so what value is considered "very large" that I don't have to at epsilon anymore? What If I say n =2 is very large and thus don't have to add an epsilon?

So my question boils down to "What defines a small number?" Do I do this approximation for P(x<a) for some abritary a that is a universal small number?

In normal distribution calculations sometimes they subtract 0.5 from what they want other times they dont... Why... Eg: P(X<12)~ P(X<11.5) I understand that it is a better approximation but would we be wrong if we just calculage P(X<12) ? Also for very large values they dont change it...

Re: MATH1231/1241/1251 SOS Thread It may just be unfair that we know a method some normal maths students wouldn't know but let's not take the risk.

Re: MATH1231/1241/1251 SOS Thread But we don't do contrapositives in 1241,1251...

Re: MATH1231/1241/1251 SOS Thread If you have two unknowns in an equation let one of them equal to a variable.

Re: MATH1231/1241/1251 SOS Thread By definition T(0) = 0.

https://webcms3.cse.unsw.edu.au/COMP1911/16s1/ They literally go soooooooooooo slow so its easy to learn by yourself... Best course I did because the lecturer was a savage

Learn C it actually makes sense.

pls... Peter Brown loves me

hahahahah nevermind... I hope the maths department can forgive me for accusing them of something they didn't do... thanks