Wall for Habibkhan

http://gateoverflow.in/87737/bag-there-are-some-balls-the-same-size-that-are-colored-colors?show=87775#a87775
hie..please help me with this one.please read my doubts in comments and then clear them.
Thankyou

http://gateoverflow.in/85601/game-there-closed-doors-leads-nothing-leads-expensive-sports

can you pls help me with?
with option 1,prob is 1/5.
what if person chooses option 2 and then switches ,i think then in this scenario,prob will be 1/4 ..

http://gateoverflow.in/4619/asked-there-large-prize-behind-three-doors-other-doors-losers?show=85845#c85845

in 'c' part of this question,can you explain how is the probability 2/3 as
 it is asking for probability that prize is behind door 1 given that monty has chosen door 2. and you have chosen door 3.

Now,as monty has chosen door 2,definitly it is not the door with the prize,prize can be only in door 1 or door 3,so should'nt it be 1/2??

pleae correct me.

Thankyou

The width of the slot of a duralumin is (in inches) normally distributed with μ=0.900 and σ=0.0030. The specification limits were given as 9000±0.0050.
What % of forgings will be defective?

can you please explain with the solution?
Thankyou

http://gateoverflow.in/3804/gate2005-it-43?state=edit-84380&show=84380#c84380
could you please provide the solution ..

Please verify the answer
http://gateoverflow.in/84317/made-eady-ts

can you verify my answer please? http://gateoverflow.in/1839/gate2006-61

http://gateoverflow.in/82568/imp-sdt-question
Answer this please

http://gateoverflow.in/80964/parsing#c81137
Kindly have a look

http://gateoverflow.in/79284/characteristic-equation-of-matrix
Have a look