CBSE maths

i did a hell lot of mistakes today....[set-1]

plz tell if i will get any marks for it:::
1.in linear diff. equation i did not take exponent of integrating factor[2]
2.for boy probability one i just wrote answers.....as time was less[2]
3.for other differential i wrote an answer in taking exponent of tan^-1 to remove log from other two terms.which we don do usually will they try to understand it or strike off my answer??
4.for cos @ substituion differential two might be possible answers a negative and a positive.i wrote negative one in marking scheme they give only one answer???[2]

@tapan ya... something like this

5 ± ()log ± ()log

cant remember whether + or - ...

ya exavtly
igot 5±log(15/8)±log(sumthin)

ya mine one also looks like this only

but that probability question is still a big ?

sandipan did u get the answer to area question(are bounded in the interior of 4x²+4y²=9 and the parabola x²=4y)

i did the triangle one..

for the area integration got a sin inverse 2√2/3 +sumthing +sumthing
dont remember exactly

hey....probabbility 6 mark was easy[but i don want to stop ur grey cells from working so giving a hint:think of all formula u have in syllabus[not mathematical expression but the statement with that formula[1][1]
if anyone finds out ok.else at night i m giving full solution ok??]

BUT IRONY:::::::::::;
i told all students in my room how to do this question.but see wat pity.......in telling them many times i thought i did it......n cam home to see i have left it[2][2].as there was no tick nor do i remember writing in my paper telling them created a feel that i solved it[3][3]........this year is going too unlucky for me[2]

what do u mean AISSCE?
where were the invigilators?
and i heard from some who could do that that the ans was 3/5 and application of baye's theorem

anyway thnks arka n sandipan

if anybdy come to no abt it plz do tell me

thnks all

@yaar cheating karane me expert hain[1][1]

really... is the answer 1/4...

if the method of the sum is utter rubbish... but answer correct.. how much marks am i supposed to get???

this is what i've done.... plz reply.... got too excited seeing AISSCE's edited post..

P(two balls white)=1/2

P(no balls white)=1/2

P(all balls white)=1/2 x 1/2 = 1/4

i know this has no meaning... can i sttill expect some... some marks !!! [112]

Dekho i posted my sol.n here (those who need it)

http://targetiit.com/iit-jee-forum/posts/probability-15330.html

Ppr theek-thak tha, no chance of a 100 [2]...but expecting 96 at least.

really asish???[plz tell me the ques no. and pg no.[1]]

any one whu can answr 6 mark prob q on white balls

wat was the ans to that 6 marks probality ques on white balls?
plz reply

aisa koi question nahi tha

i gt 3/5

1) 1/3

2) 1/2

guys plzz tell