## HELP!!!! 2 years ago A computer randomly picks a two digit number greater than 49. Find the odds that the number picked is a multiple of 5.

1. HELP!!!!

I really have no idea... HELP!!!!

2. RaphaelFilgueiras

the odd is probability?

3. swissgirl

How many 2 digit numbers are there?

4. HELP!!!!

I don't know

5. HELP!!!!

odds does not mean odd in this question

6. HELP!!!!

odds mean by probability

7. swissgirl

well lets count 10-99

8. swissgirl

Ok there are 90 2 digit numbers

9. RaphaelFilgueiras

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10. swissgirl

And that number has to be great than 49

11. swissgirl

S there are 50 possible choices altogether

12. RaphaelFilgueiras

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13. RaphaelFilgueiras

now the probability is n/n1

14. HELP!!!!

my answer book says 1:4 but I dont understand

15. swissgirl

hmmm I got a 1/5

16. RaphaelFilgueiras

@HELP!!!! get it?

17. swissgirl

How did you get n_1=40?

18. HELP!!!!

im kind of confused with the n1 and n

19. RaphaelFilgueiras

sorry 50

20. RaphaelFilgueiras

1/5

21. HELP!!!!

uhhhh

22. HELP!!!!

my book says 1:4 can anyone explain how or why?

23. HELP!!!!

can you guys guess how that happened?

24. RaphaelFilgueiras

i htink the rigth ans is 1/5if odd means probability

25. zzr0ck3r

hmm I would have guessed 1/5, but it must have something to do with starting on 50

26. swissgirl

But it can be 50 since the number is greater than 49

27. zzr0ck3r

right, I still don't see how that makes it 1 to 4

28. swissgirl

umm are u sure the answer is 1:4?

29. RaphaelFilgueiras

i think the book is wrong

30. HELP!!!!

well my work book is ment to trick people somehow

31. zzr0ck3r

oh 1/5 is 1:4

32. swissgirl

How so?

33. zzr0ck3r

favorable outcome : unfavorable outcume

34. zzr0ck3r

I think, maybe not....

35. zzr0ck3r

1 to 4 ratio means put in 1 for every 4 so you have put in 1/5

36. RaphaelFilgueiras

make some sense

37. HELP!!!!

IM LOST

38. HELP!!!!

but I get it at the same time

39. swissgirl

hahahaah oh yaaaaaaaaa?

40. RaphaelFilgueiras

four cons and 1 odd

41. swissgirl

Ohhhh I seee now I get it

42. zzr0ck3r

imagine a 1:4 ratio of some liquid and water for every 4 gallons of water you put in one gallon of some liquid if you do this once, you have put in 1/5 of the whole

43. swissgirl

Yup I see that

44. RaphaelFilgueiras

weird way to put the answer

45. HELP!!!!

I SI

46. swissgirl

Ok so basically the probability that you will get a multiple of 5 is a 1/5 meaning that for every 5 picks one out of the 5 picks will be a multiple of 5. In other words 1 pick will be a multiple of 5 while the other 4 will not. Do you follow @HELP!!!!

47. kirbykirby

lol i had a huge discussion about odds and ratios yesterday

48. swissgirl

Its weird that the answer is in a ratio. I dont see the point of that.

49. HELP!!!!

wow ...

50. HELP!!!!

Well thanks guys 4 the HELP!!!!

51. HELP!!!!

its seems like everyone wants to talk about it alittle bit more