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Math Help - circle diagram multiple question..

  1. #1
    MHF Contributor
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    circle diagram multiple question..

    bank L has 40% of people
    bank P has 50% of people
    bank M has 30% of people
    15% are both in bank L and bank P
    13% are both in bank L and bank M
    11% are both in bank P and bank M

    5% are in all three banks
    percent of people who are only in one bank of the three
    the possible answers are:
    a.11% b.17% c.29% d.57% e.86%

    ?

    i have built this diagram and got 57% from suuming the areas which are free
    i was told that my digram is wrong because because i didnt mention the people who dont have any bank,
    how to know if there are people who are not present in any bank
    what is their presentage
    ??

    question B)
    find presentage of people with at least one bank?
    a.14% b.43% c.57% d.86%
    ?

    in my diargam every one has a bank so its 100%
    where is my mistake?
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  2. #2
    Super Member

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    Lexington, MA (USA)
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    Re: circle diagram multiple question..

    Hello, transgalactic!

    Bank L has 40% of people
    Bank P has 50% of people
    Bank M has 30% of people
    15% are both in bank L and bank P
    13% are both in bank L and bank M
    11% are both in bank P and bank M
    5% are in all three banks

    Percent of people who are only in one bank of the three:

    . . (a) 11% . . (b) 17% . . (c) 29% . . (d) 57% . . (e) 86%


    i have built this diagram and got 57% from suuming the areas which are free.
    i was told that my diagram is wrong because i didn't mention the people
    . . who don't have any bank,

    How to know if there are people who are not present in any bank?
    What is their percentage?

    Question (B): Find presentage of people with at least one bank?
    . . (a)14% . . (b) 43% . . (c) 57% . . (d) 86%


    in my diargam every one has a bank so its 100% . No!

    Where is my mistake?


    Your diagram is correct.

    Did you add the numbers in your diagram?

    We find that they add up to 86%.
    This means that 14% is outside of the three rings.
    Those are the people who have no bank.

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