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Researchers at the University of Pennsylvania School of Medicine have determined that children under 2 years old who sleep with the lights on have a 36% chance of becoming myopic before they turn 16. Children who sleep in darkness have a 21% chance of becoming myopic before they turn 16. A survey indicates that 28% of children under 2 sleep with some light on. If a randomly selected child under 16 is myopic, what is the probability that he/she slept with the light on before they turned 2?

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Lauren

  1. P(M|L)=.36
    P(M|L^c)=.21
    P(L)=.28
    P(L^c)=.72
    P(M|L)P(L)+P(M|L^c)P(L^c)
    .36*.28+.21*.72
    .252
    Baye's Rule

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    Jesse

  2. m/p=236

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    Anonymous

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