ISI PEA 2015 discussion

[amalgamateking]

Yes got it. Thanks. What is your background? Economics?

[onionknight]

 . Nope, engineering. What about you?

[amalgamateking]

Iit? Mine toh economics

[onionknight]

Cool

[Rajat]

what answer did people get for the one bayes theorem ? green card, red card

[onionknight]

2/3

[Ankita]

What about the one f(x,y)-f(y,0)+f(0,x) = ??
Does anyone remember any other function questions??

I got 0 as the answer for this ques

[onionknight]

It should be zero I guess. f (x,y)= x-y satisfied the given condition and for this function it'll be 0. There was one with 3xex-x3-e3x which talked about maxima/ minima or something and one with multiple constraints where we had to find a point which could never be the maximum.

Anybody did regression ques where we need to find out the value of R^2 ??  

N answer to the x + y + z = 10 was 66 ??

[onionknight]

Yes 66 is correct. I didn't do the regression question just made a guess. What's the correct answer?

[Ankita]

Wait.. zero must be correct but how does f(x,y)=x-y satisfy the following condition:
f(x,y)+f(y,z)+f(z,x)=1
x-y+y-z+z-x = 0
????

[onionknight]

It was fxy+fyz+fzx=0 as far as I remember

U wrote the wrong condition , it was 0 on the right hand side

[Ankita]

Really!! I still think it was 1.... Maybe it wasn't.
What about the optimization one? maximizing ax+by

[onionknight]

C 1/4,1/4

[Ankita]

Right... :)

I couldn't even recall this ques. ax+by subjected to what constraints

[onionknight]

X+y <=1 and 2x+y/2 <=1

[Gurpreet Pannu]

hey you remember the answer to maximise 3xy-y^3 question?
Also please someone answer the regression question i guessed 1-0.35^2. Should have covered the topic.