SOLUTION: What's the probability of a student having a x cell phone, if it is given that he has a y cell phone? There are 1000 students, 420 have x cell phones, 580 have y cell phones, an

Question 863100: What's the probability of a student having a x cell phone, if it is given that he has a y cell phone?
There are 1000 students, 420 have x cell phones, 580 have y cell phones, and 80 have both
Found 2 solutions by jim_thompson5910, ewatrrr:
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
There are 80 people who have both x and y types. This is out of 580 people who have type y phones. So the answer as a fraction is
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

Hi
P(A|B) = P(A and B)/P(B)
P(x |y =
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