In a group, the 80% is married. 75% of the married have a work. 5% does not have a work and are not marrid

- osanseviero

- jamiebookeater

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- osanseviero

What percentage does not have a work?

- osanseviero

25% I think

- osanseviero

|dw:1383266857976:dw| Is that right?

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## More answers

- osanseviero

The last 25% is without

- anonymous

actually i got a different answer, we know this much
80% = married
75 % = married and work
5% = married and do not work
from this we know that out of the 80% of the people, only 5% do not have a job.
so now let look at the remaining 20% of non married people

- anonymous

we know this much
5% = people who arent married and do not work
so far this is all be know from the info provided but the question doesnt mention anything about the remaining 15%
but, we can reason out that the 15% much be people who are not married but work
there fore 15% = not married but work

- anonymous

finally, out of the 80% of married people, only 5% do not have jobs and out of the 20% of single people only 5% do not have job.
to conclude, there are a total of 10% of people that do not have jobs,
10% is ur answer

- anonymous

i am sorry that it was so long but i hope that you understood it,
any questions?

- osanseviero

But the problem says
Married: 80% (of the total)
With work: 75% (of the married, so this is 75% of 80, so it would be a 60% of the total)
Without a work: 5% (of the total, so itwould be 25% of a 20%)
Single: 20%

- osanseviero

I am right until there?

- anonymous

|dw:1383269057108:dw|

- osanseviero

Ok, perfect, so a 10% has no work

- osanseviero

wait

- osanseviero

But the 75% apply to the married people, so it is 75% of 80%, (60)

- osanseviero

|dw:1383269250683:dw|

- anonymous

ok and the 5% does not have a work and are not marrid, is that 5% of 100%? or something else?

- anonymous

the quesiton doesnt specify if that 5% is of the 100% or the remaining 20%

- osanseviero

"Finally, 5% are not married and neither have a work" I think it is of the 100%

- anonymous

i agree with you that it's 75% of 80%, ill change that now, but before i do, i would think 5% of 100% as well

- anonymous

yea i think it's 25% as well, sry for mis reading the question

- anonymous

but atleast u got a 2nd opinion in the end!

- osanseviero

Hahaha thanks :)

- osanseviero

The hard question is: if one person has a work, which is the probability of him being married

- osanseviero

\[P(A\B) = \frac{ P(A intersecting with B)}{ B }\]

- osanseviero

Is that useful for this one?

- anonymous

im not familiar with that equation, but ik you dont need it, it can be reasoned out

- osanseviero

P(A)=3/4 (probability of being married P(B)= 3/4 (probability of having a job)

- osanseviero

Mmm...75% of the 75%

- osanseviero

or 75% of 60%

- anonymous

im a calc student so idk statistic equations lol but ik that i can reason it out lol 1 sec

- anonymous

id say 60% are married and work, 15% arnt married but work. there fore we find
60/75 x 100 and that should give us our answer

- anonymous

i got 80%

- anonymous

wait

- osanseviero

Ok

- anonymous

yep i got 80%

- osanseviero

Can you explain me again the logic? You want to calculate the 75% of the 60%, but why?

- anonymous

kk, i did it in a calculus way though xD but u seem smart enough to understadn it :)
Let x = total number of people
y = 75% of x (number of people working)
and let z = 60% of x (number of people married and working)
therefore z/y times 100 = the percentage of married and working compared to just working)

- anonymous

therefore z/y of 100 =
60% of x / 75% of x times 100
the x cancels so
60/100 / 75/100 times 100
60/75 times 100

- anonymous

if that makes sense xD

- anonymous

does that make any sense?

- osanseviero

Yes :D thanks

- osanseviero

The last question is what percentage is married inside the ones that does not have a job

- osanseviero

So... 75-100
x-80
Can that apply? 80*75 divded by 100

- osanseviero

I mean x-25

- osanseviero

Let me formulate that again

- osanseviero

x=total
y=75% of x
z=25% of x

- osanseviero

75/25=3*

- anonymous

in this case
x = total
y = 25% of x (people with no jobs)
z = 20% of x (people who are married and do not have a job)
z/y times 100 = 20/25 times 100 = 80%.. wait, again? O.o

- anonymous

i dont see anything wrong with it, wat do you think? looks right to me

- osanseviero

Looks good o.O

- anonymous

lol it's just fishy but yea xD

- osanseviero

Do you want with another question? :) (similar problem)

- osanseviero

Btw, thanks a lot

- anonymous

yea sure, how many questions do you have to do?

- osanseviero

One problem more :) but it has 4 questions

- anonymous

btw, do you have to show working? cause i can bet ur teacher would of wanted you to of solved it a different way xD

- anonymous

but sure, u can post the last question as a new topic

- osanseviero

Probably he wanted...but he is happy if he sees us having any way. He likes us to be independent. I will post next one

- anonymous

kk, but still id be nice to learn another way cause this way is tedious. probably there is an equation that would of made all of this simple

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