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Math Help - Set A intercept B'

  1. #1
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    Set A intercept B'

    This perhaps a fairly trivial question for most. But as I haven't done this for years I just needed someone to tell me if I was correct.

    The universal set E = {Whole numbers}
    A = {multiples of 5}
    B = {multiples of 3}

    1) What are 3 members of A intercept B'?

    Is the answer say 5, 10 and 20? It is basically anything which belongs to A but does not include multiples of 3. Am I correct?

    2) C = {multiples of 10}. What are 3 members of A intercept B intercept C'?

    Could it be say 15, 45 and 75
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  2. #2
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    Quote Originally Posted by Natasha1 View Post
    This perhaps a fairly trivial question for most. But as I haven't done this for years I just needed someone to tell me if I was correct.

    The universal set E = {Whole numbers}
    A = {multiples of 5}
    B = {multiples of 3}

    1) What are 3 members of A intercept B'?

    Is the answer say 5, 10 and 20? It is basically anything which belongs to A but does not include multiples of 3. Am I correct?

    2) C = {multiples of 10}. What are 3 members of A intercept B intercept C'? Could it be say 15, 45 and 75
    Yes, they are correct.
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  3. #3
    Super Member TheChaz's Avatar
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    Correct!
    Last edited by TheChaz; March 26th 2011 at 06:17 AM. Reason: Didn't see the "'"
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