osanseviero Group Title In a group, the 80% is married. 75% of the married have a work. 5% does not have a work and are not marrid 10 months ago 10 months ago

1. osanseviero Group Title

What percentage does not have a work?

2. osanseviero Group Title

25% I think

3. osanseviero Group Title

|dw:1383266857976:dw| Is that right?

4. osanseviero Group Title

The last 25% is without

5. HawkCrimson Group Title

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

6. HawkCrimson Group Title

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

7. HawkCrimson Group Title

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

8. HawkCrimson Group Title

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

9. osanseviero Group Title

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%

10. osanseviero Group Title

I am right until there?

11. HawkCrimson Group Title

|dw:1383269057108:dw|

12. osanseviero Group Title

Ok, perfect, so a 10% has no work

13. osanseviero Group Title

wait

14. osanseviero Group Title

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

15. osanseviero Group Title

|dw:1383269250683:dw|

16. HawkCrimson Group Title

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

17. HawkCrimson Group Title

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

18. osanseviero Group Title

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

19. HawkCrimson Group Title

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

20. HawkCrimson Group Title

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

21. HawkCrimson Group Title

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

22. osanseviero Group Title

Hahaha thanks :)

23. osanseviero Group Title

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

24. osanseviero Group Title

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

25. osanseviero Group Title

Is that useful for this one?

26. HawkCrimson Group Title

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

27. osanseviero Group Title

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

28. osanseviero Group Title

Mmm...75% of the 75%

29. osanseviero Group Title

or 75% of 60%

30. HawkCrimson Group Title

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

31. HawkCrimson Group Title

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

32. HawkCrimson Group Title

i got 80%

33. HawkCrimson Group Title

wait

34. osanseviero Group Title

Ok

35. HawkCrimson Group Title

yep i got 80%

36. osanseviero Group Title

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

37. HawkCrimson Group Title

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)

38. HawkCrimson Group Title

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

39. HawkCrimson Group Title

if that makes sense xD

40. HawkCrimson Group Title

does that make any sense?

41. osanseviero Group Title

Yes :D thanks

42. osanseviero Group Title

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

43. osanseviero Group Title

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

44. osanseviero Group Title

I mean x-25

45. osanseviero Group Title

Let me formulate that again

46. osanseviero Group Title

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

47. osanseviero Group Title

75/25=3*

48. HawkCrimson Group Title

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

49. HawkCrimson Group Title

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

50. osanseviero Group Title

Looks good o.O

51. HawkCrimson Group Title

lol it's just fishy but yea xD

52. osanseviero Group Title

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

53. osanseviero Group Title

Btw, thanks a lot

54. HawkCrimson Group Title

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

55. osanseviero Group Title

One problem more :) but it has 4 questions

56. HawkCrimson Group Title

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

57. HawkCrimson Group Title

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

58. osanseviero Group Title

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

59. HawkCrimson Group Title

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