A computer randomly picks a two digit number greater than 49. Find the odds that the number picked is a multiple of 5.

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- schrodinger

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- HELP!!!!

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

- anonymous

the odd is probability?

- swissgirl

How many 2 digit numbers are there?

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## More answers

- HELP!!!!

I don't know

- HELP!!!!

odds does not mean odd in this question

- HELP!!!!

odds mean by probability

- swissgirl

well lets count
10-99

- swissgirl

Ok there are 90 2 digit numbers

- anonymous

|dw:1372307123036:dw|

- swissgirl

And that number has to be great than 49

- swissgirl

S there are 50 possible choices altogether

- anonymous

|dw:1372307186299:dw|

- anonymous

now the probability is n/n1

- HELP!!!!

my answer book says 1:4 but I dont understand

- swissgirl

hmmm I got a 1/5

- anonymous

@HELP!!!! get it?

- swissgirl

How did you get n_1=40?

- HELP!!!!

im kind of confused with the n1 and n

- anonymous

sorry 50

- anonymous

1/5

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uhhhh

- HELP!!!!

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

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can you guys guess how that happened?

- anonymous

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

- zzr0ck3r

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

- swissgirl

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

- zzr0ck3r

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

- swissgirl

umm are u sure the answer is 1:4?

- anonymous

i think the book is wrong

- HELP!!!!

well my work book is ment to trick people somehow

- zzr0ck3r

oh 1/5 is 1:4

- swissgirl

How so?

- zzr0ck3r

favorable outcome : unfavorable outcume

- zzr0ck3r

I think, maybe not....

- zzr0ck3r

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

- anonymous

make some sense

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IM LOST

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but I get it at the same time

- swissgirl

hahahaah oh yaaaaaaaaa?

- anonymous

four cons and 1 odd

- swissgirl

Ohhhh I seee now I get it

- 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

- swissgirl

Yup I see that

- anonymous

weird way to put the answer

- HELP!!!!

I SI

- 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!!!!

- kirbykirby

lol i had a huge discussion about odds and ratios yesterday

- swissgirl

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

- HELP!!!!

wow ...

- HELP!!!!

Well thanks guys 4 the HELP!!!!

- HELP!!!!

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

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