anonymous
  • anonymous
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.
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
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anonymous
  • anonymous
P(Y|X) = P(Y intersection X)/P(X) = 80/420

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