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Math Help - Pets

  1. #1
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    Pets

    A veterinarian surveys 26 of his patrons. He discovers that 14 have dogs, 10 have cats, and 5 have fish. Four have dogs and cats, 3 have dogs and fish, and one has a cat and fish. If no one has all three kinds of pets, how many patrons have none of these pets?
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  2. #2
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    Quote Originally Posted by symmetry View Post
    A veterinarian surveys 26 of his patrons. He discovers that 14 have dogs, 10 have cats, and 5 have fish. Four have dogs and cats, 3 have dogs and fish, and one has a cat and fish. If no one has all three kinds of pets, how many patrons have none of these pets?
    Hello,

    draw a diagram (see attachment).

    There are only 21 persons listed in the diagram. Therefore 5 persons don't have these kinds of pets.

    EB
    Attached Thumbnails Attached Thumbnails Pets-dogcatfish.gif  
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  3. #3
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    ok

    Earboth,

    I love your replies with diagrams.

    Tell me, what is the secret?

    How do you post diagrams here?

    Thanks!
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  4. #4
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    Quote Originally Posted by symmetry View Post
    Earboth,
    I love your replies with diagrams.
    Tell me, what is the secret?
    How do you post diagrams here? Thanks!
    Hello,

    when you write a post you find in the section "Additional Options" a button "Manage Attachments" (see attachment) where you can upload a graphic from your hard disc.

    EB
    Attached Thumbnails Attached Thumbnails Pets-attach_button.gif  
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