Of the 1,000 students in a local college, 420 own brand X mobile phones and 580 own brand Y mobile phones. Of these students, 80 own both brands of mobile phones. Find the probability that a student chosen at random has a brand X mobile phone given that he has a brand Y mobile phone.
2/14
5/21
3/28
4/29

- anonymous

- schrodinger

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- anonymous

@Miss.SweetiePie

- anonymous

sorry for bugging! it's just that i cant get any wrong or else i wont pass

- anonymous

its okay, its just I dont feel too confident in helping in this one right now...is there another we can try ?

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- anonymous

this is the last one /:

- anonymous

maybbe @welshfella can help

- anonymous

alright hopefully they answer haha

- anonymous

- anonymous

- anonymous

- anonymous

- anonymous

im being ignored v.v lol

- anonymous

what if no one answers? im screwed @Miss.SweetiePie

- welshfella

sorry i've forgotten this stuff

- anonymous

it's ok i dont blame u

- anonymous

tell me when im gonna need this in life lol

- anonymous

looks like it's just u and me xD @Miss.SweetiePie

- anonymous

you leave* haha

- anonymous

no im here Im just doing something as well

- anonymous

omg im scared!!! lol xD

- anonymous

i HAVE to get this stupid question right

- anonymous

when does it have to be turned in?

- anonymous

it doesnt have a due date it's just a mastery test on plato

- anonymous

hi !
okay so this is a question f conditional probability.
the condition here is that the student chosen has a Y brand phone
so our sample becomes 580 from 1000 ( because 580 students have Y brand phone)
now we know that 80 students have both
so the probability will be 80/580

- anonymous

aka credit recovery

- anonymous

so i just need to simplify that? @nitishdua31

- anonymous

yes :)

- anonymous

just remember, whenever there is a condition, the sample set changes

- anonymous

omg thanks!

- anonymous

ur welcome

- anonymous

FUTURE PLATO PEOPLE! the answer is D 4/29

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