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Mathematics: Post your doubts here!

Anum96

Anum96

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holoholo said:
how did you get 0.1 ?
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Umm I just completed the table. You get the second value of the last column by; 1 - (1/5). You get 0.8. Then you have been given the probability of kitch in a mess. Which is the third value of first column(3/5). You get the third value of second column by; 1 - (3/5). You get 0.4.
Calculate the first value of the second column. You get 0.1 (0.4 - 0.3) And then lastly, The requirement. 1/5 - 0.1 is 0.1
 
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***amd***

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***amd*** said:
1/8
like u multiply total of 'meal on time' with total of 'kitchen left on mess'
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Anum96 said:
Umm I just completed the table. You get the second value of the last column by; 1 - (1/5). You get 0.8. Then you have been given the probability of kitch in a mess. Which is the third value of first column(3/5). You get the third value of second column by; 1 - (3/5). You get 0.4.
Calculate the first value of the second column. You get 0.1 (0.4 - 0.3) And then lastly, The requirement. 1/5 - 0.1 is 0.1
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oh sorry i didnt see that 3/5 in the question. my bad
 
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holoholo

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if you actually calculate each probability you get a different answer. for example probability of meal served on time and kitchen is a mess = (1/5)*(3/5)=0.12. why are the answers different ?
 
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holoholo said:
if you actually calculate each probability you get a different answer. for example probability of meal served on time and kitchen is a mess = (1/5)*(3/5)=0.12. why are the answers different ?
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Dont take into account the whole probability. because that way your ans will include kitchen with no mess and not served on time 's probability too.
 
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***amd*** said:
didnt quite get you there. can u plz explain?
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In this question, we cannot use that method since the answer will take into account 'meal not served on time' and 'kitchen with no mess' 's probability as well. We need to determine the required probability separately. In other words, question is not asking for total. I hope I'm coherent enough. :/
 
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Anum96 said:
In this question, we cannot use that method since the answer will take into account 'meal not served on time' and 'kitchen with no mess' 's probability as well. We need to determine the required probability separately. In other words, question is not asking for total. I hope I'm coherent enough. :/
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didnt get it. Will try on it later again.
thanks btw :)
 
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***amd*** said:
didnt get it. Will try on it later again.
thanks btw :)
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Ill try one more time
Its probably a conditional probability question :/
Because meal served on time WHEN theres mess made gives 0.1
Otherwise its what you^ are getting.
 
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Anum96 said:
Ill try one more time
Its probably a conditional probability question :/
Because meal served on time WHEN theres mess made gives 0.1
Otherwise its what you^ are getting.
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lol. still didnt get it.
dw, I guess I'll do it when my mind gets off of my phys exam tomorrow.
 
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