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anonymous

  • one year ago

Suppose 80% of kids who visit a doctor have a fever, and 25% of kids with a fever have a sore throat. What's the probability that a kid who goes to the doctor has a fever and a sore throat?

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  1. amina_soneviseth
    • one year ago
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    To find compound probabilities like this multiply the individual probabilities. For instance toss a coin twice what are the odds of heads both times? (1/2)(1/2)=1/4 So rewrite your percentages as fractions or decimals and multiply to get your answer.

  2. anonymous
    • one year ago
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    so .80*.25?

  3. amina_soneviseth
    • one year ago
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    yes and make it a percentage. :D PLEASE GIVE MEDALS IF THIS HELPED

  4. anonymous
    • one year ago
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    can you help me with 1 more question I'll give you a bunch of medals!

  5. anonymous
    • one year ago
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    a card is drawn at random from a standard deck of 52 cards find the following conditional probabilities a)the card is a spade given that it is black b)the card is black given that it is a spade c) the card is a queen given that it is black d) the card is a jack given that it is a face card

  6. anonymous
    • one year ago
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    I have a hard time with these "given that" problems

  7. amina_soneviseth
    • one year ago
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    @tofusoup a.)becuase theres like 13 black spades in a deck IF THIS HELPED MEDAL AND FAN TY!

  8. ybarrap
    • one year ago
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    "Given That" problems mean that you ignore all other possibilities and treat only that particular subset of events. For example, given that a)the card is a spade given that it is black we take as the only possible events, the black cards. Of these black cards, how many are spades? If there are x black cards and y of these are spades, then the probability of y given x is just \(\cfrac{y}{x}\).

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