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![[Post New]](/templates/default/images/icon_minipost_new.gif) 19 Feb 2008 21:59:23 IST
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Sir, I've learnt all the formula used in the probabilty- the conditional probability, Baye's theo., Binomial Distribution etc. But I'm unable to solve problems, Just I can't Understand how to begin with.
Please give few tips- what all equations we must first frame what variables to take how to use them i'm much confused
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The deepest secret is that life is not a process of discovery, but a process of creation. You are not discovering yourself, but creating yourself anew. Seek therefore, not to find out who you are; seek to determine who you want to be."
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19 Feb 2008 22:01:56 IST
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GO FOR SOME ILLUSTRATIVE EXAMPLES FROM RD SHARMA...
then try some unsolved ones yourself you will find them simpler as you will go on.......
BEST OF LUCK.........
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There's Light at the end of every Tunnel, so KEEP MOVING....
Best of luck to all my mates....
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19 Feb 2008 22:57:47 IST
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practice practice n practise
see how the examples r solved
try to solve them without glancing them again
solve it until u get the correct answer find the mistake if u did
then go for the other
this applies for every part in maths
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19 Feb 2008 23:01:16 IST
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hii
well it is hard to tell the way of learning probability and its applications .. after it depends on different individuals.
But i suggest that u start with easy things ... try easy soved question .. n thn try easy unsolved questions .. try to get ur basics set n thn u can go for the tough ones ..
cheers
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Puneet Agrawal
IIT Delhi
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19 Feb 2008 23:08:36 IST
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never use the formula.....u will get mad .........
a company get raw materials from A,B,C wit respestive probability=.3,.5,.2
i% of gud raw materials sent by A,B,C is 30%,40%,95% of thier own production.
if the question is probability of finding C type raw materials given gud raw materials............
then u should have to use bayes theorem................
but go the way the theorem is derived
let total of 1 gud be produced...wit a contribution of .3,.5..2 from A,B,C.
the total no. of gud materials = (.3)x30% + (.5)x40% + (.2)x95%
=.48
so in 1 materials .48 gud ones.
probabily to find c in given gud materials =(total gud ones produced by c) / (total gud one produced)
= (.2x95%) / (.48)
but if
as per conditional theorem.....
find probability(finding C / gud ones) =ans will be different.
u should have used
probability(findiang c gud ones / finding gud ones )=same answer.
wht ever u take (bayes or conditioanl u get the sane answer.........but u have to change probability considered accordingly..............)
i hope i am not wrong.........................
mistakes r possiable...........if i am mistaken dont forget to nudge me....
otherwise plz rate me............
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19 Feb 2008 23:10:09 IST
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well help me out for this prob;
A box of oranges is inspected by examining three randomly selected oranges drawn without replacement. if all the 3 oranges are good, the box is approved 4 sale otherwise it is rejected. Find the probability that a box containing 15 oranges out of which 12 r good and 3 r bad will be approved for sale
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The deepest secret is that life is not a process of discovery, but a process of creation. You are not discovering yourself, but creating yourself anew. Seek therefore, not to find out who you are; seek to determine who you want to be."
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19 Feb 2008 23:35:07 IST
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is it .4835
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19 Feb 2008 23:45:36 IST
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yes plz tell how
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The deepest secret is that life is not a process of discovery, but a process of creation. You are not discovering yourself, but creating yourself anew. Seek therefore, not to find out who you are; seek to determine who you want to be."
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20 Feb 2008 00:45:45 IST
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just divide the different ways possiable...
ie
12 c 3 / 15 c 3
it has nothing to do with bayes theorem
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20 Feb 2008 12:32:43 IST
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what concept have u used i was thinking the solution to be somewhat much different from u
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The deepest secret is that life is not a process of discovery, but a process of creation. You are not discovering yourself, but creating yourself anew. Seek therefore, not to find out who you are; seek to determine who you want to be."
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20 Feb 2008 23:17:54 IST
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that can be solved simply by multiplication theorem rather than baye's. Probability of happening ofA then B and then C is P(A).P(B).P(C)
Imagination is a great asset in probability.
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ATTITUDE DETERMINES ALTITUDE |
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