## yashar806 Group Title need help !!! one year ago one year ago

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1. yashar806 Group Title

We have four boxes, each of which contains ten coloured balls: Box 1 contains 4 red balls, 5 green balls and 1 yellow ball Box 2 contains 3 red balls, 5 green balls and 2 yellow balls Box 3 contains 2 red balls, 5 green balls and 3 yellow balls Box 4 contains 1 red ball, 5 green balls and 4 yellow balls If we randomly select one ball from each box, what is the probability of selcecting exactly one red ball? If we randomly select one ball from each box, what is the probability of selcecting at one red ball?

2. honourznr Group Title

ı think (4/10)*(3/10)*(2/10)*(1/10)

3. yashar806 Group Title

4. yashar806 Group Title

but im not sure how to get that answer

5. honourznr Group Title

6. honourznr Group Title

we use all box isnt it?

7. yashar806 Group Title

i guess so

8. yashar806 Group Title

any ideA?

9. honourznr Group Title

ı dont understand question very well 4 balls will red?

10. honourznr Group Title

all the balls must be red ? 4 balls ? like red red red red ?

11. electrokid Group Title

${4\over4+5+1}\times{3\over3+5+2}\times{2\over2+5+3}\times{1\over1+5+4}=?$

12. yashar806 Group Title

13. yashar806 Group Title

of course its add up to 1

14. electrokid Group Title

no wait got

15. electrokid Group Title

1 ball from EACH box

16. electrokid Group Title

so, P = 1red from box1 and 3no-red + 1 red from box2 and 3 no red +...

17. yashar806 Group Title

still dont get it

18. PeterPan Group Title

Okay... what's the probability of getting a red ball from ONLY the first box? That's the product of the probability of getting a red ball from the first box and NOT getting a red ball from the other three boxes...

19. yashar806 Group Title

should I use bionomial probability?

20. PeterPan Group Title

I don't know what that is ^ (c'mon go easy on me :> ) But it seems the odds of getting a red ball from the first box is 2 out of 5 odds of NOT getting a red ball from the second box is 7 out of 10 not getting a red ball from the third : 4 out of 5 not getting a red ball from the fourth : 9 out of 10 Now just multiply these, and this'll be one of the things you add...

21. honourznr Group Title

ı did the questions

22. PeterPan Group Title

merhaba, @honourznr What did you get? ^.^

23. yashar806 Group Title

merhaba?

24. honourznr Group Title

(4/10*7/10*8/10*9/10)+ (3/10*6/10*8/10*9/10)+(2/10*9/10*7/10*6/10)+(1/10*8/10*7/10*6/10)= 0.436=0.44

25. PeterPan Group Title

It's like "hello" only more exotic

26. honourznr Group Title

:)

27. honourznr Group Title

merhaba

28. PeterPan Group Title

Well, as long as @honourznr did the arithmetic correctly... there's no reason for it to be wrong :)

29. PeterPan Group Title

On second thought, maybe you need to redo that, @honourznr

30. honourznr Group Title

why?

31. PeterPan Group Title

Okay, it's correct.. just jumbled up in the products, but correct :D

32. yashar806 Group Title

woww asweome what about the second one ?

33. PeterPan Group Title

At least one red ball?

34. honourznr Group Title

for example red green green yellow

35. yashar806 Group Title

ben turk

36. PeterPan Group Title

a little confusing...

37. PeterPan Group Title

also, @honourznr I did not understand that :D

38. honourznr Group Title

so yashar806 do you understand the answer

39. yashar806 Group Title

evet

40. honourznr Group Title

bileydim en baştan türkçe konuşıurdum:D

41. yashar806 Group Title

Nerelisiniz?

42. honourznr Group Title

sne össye falanmı hazırlnısn

43. yashar806 Group Title

DogoTürkistan'yi biliyor musun?

44. honourznr Group Title

evet biliyorum bnde türkiyedeyim

45. honourznr Group Title

46. yashar806 Group Title

bilmiyorm zatan

47. yashar806 Group Title

48. honourznr Group Title

onur... senin

49. yashar806 Group Title

50. honourznr Group Title

memnun oldum yaşar :) iyiakşamlar ben gidiyorum

51. yashar806 Group Title

Doğu türkistan'da

52. yashar806 Group Title

benda qok memnun oldum onur

53. honourznr Group Title

bana mesaj yolla konuşuruz sonra ....

54. yashar806 Group Title

tamam , iyiakshamlar

55. honourznr Group Title