Question

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

Answer 1

@Miss.SweetiePie

Answer 2

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

Answer 3

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

Answer 4

this is the last one /:

Answer 5

maybbe @welshfella can help

Answer 6

alright hopefully they answer haha

Answer 7

@welshfella

Answer 8

@SolomonZelman

Answer 9

@amoodarya

Answer 10

@welshfella

Answer 11

im being ignored v.v lol

Answer 12

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

Answer 13

sorry i've forgotten this stuff

Answer 14

it's ok i dont blame u

Answer 15

tell me when im gonna need this in life lol

Answer 16

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

Answer 17

you leave* haha

Answer 18

no im here Im just doing something as well

Answer 19

omg im scared!!! lol xD

Answer 20

i HAVE to get this stupid question right

Answer 21

when does it have to be turned in?

Answer 22

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

Answer 23

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

Answer 24

aka credit recovery

Answer 25

so i just need to simplify that? @nitishdua31

Answer 26

yes :)

Answer 27

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

Answer 28

omg thanks!

Answer 29

ur welcome