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SCARLET_SPIDER

  • one year ago

In a hospital ward, there are 12 nurses and 4 doctors. 3 of the nurses and 2 of the doctors are male. If a person is randomly selected from this group, what is the probability that the person is female or a doctor? @IMStuck @TheSaint905621 @Compassionate @phi @math&ing001 @acxbox22

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  1. SCARLET_SPIDER
    • one year ago
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    @TSwizzle @TheSaint905621

  2. curtisbourland
    • one year ago
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    11/16

  3. SithsAndGiggles
    • one year ago
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    \[P(\text{female or doctor})=P(\text{female})+P(\text{doctor})-P(\text{female and doctor})\] There's a total of 11 females (9 nurses, 2 doctors) in the group of 16, and there are 4 doctors. Two of these doctors are also female, so \[P(\text{female or doctor})=\frac{11}{16}+\frac{4}{16}-\frac{2}{16}\]

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