A bag contains either a 100 Rs note or a 500 Rs note, with equal probability.
I add a 100 Rs note to the bag. (I'm rich).
'A' draws a note from the bag and it is Rs 100. 'A' keeps it.
'B' draws a note now. What is the probability that 'B' draws a 100 Rs note?
Answer=2/3.
2/3..?
ReplyDelete1/2 acc to me
ReplyDeleteI also think its 1/2
ReplyDeleteyeah same here...1/2
ReplyDeleteCSL105 is a tough course when it comes to the difficulty of problems asked.
ReplyDeleteThink again.
i think it should be 1/4
ReplyDeleteDoes answer contain log term
ReplyDeleteMind it, neither I have said nor I have got the answer. Just a friend told me to confirm it(he was not joking)
But I personally feel answer is 1/2.
arre yr, simple enough, its 2/3 only
ReplyDeleteyeah...got it now...its 2/3 :)
ReplyDeletehow are u getting the answer????
ReplyDeleteplease tell how to do. thanx
ReplyDeletewe have to find P(A intersection B)/P(A)
ReplyDeleteboth A and B will draw a 100 Rs note only in if there was a 100 Rs note already present->P(A intersection B)=1/2
P(A)=(1/2)(1/2)......[if there was 500 rs note initially] + (1/2)(1).....[if there was 100 rs note initially]=3/4
divide to get 2/3
cant we do this by simply making cases????if we can.....pls post that approach
ReplyDeletePratik yaar probability module jab ho jayega tumhara tab u will find it easy, no need to trouble urself rite now
ReplyDeleteBhaiya please post some more questions of maths also, would be fun for a change
ReplyDelete