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anonymous

  • one year ago

Suppose n(X) = 28 and n(Y) = 11.(a) What is the maximum number of elements X ∪ Y can have? (b) What is the minimum number of elements X ∪ Y can have?

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  1. jim_thompson5910
    • one year ago
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    hint: \[\Large n(X \cup Y) = n(X) + n(Y) - n(X \cap Y)\]

  2. dan815
    • one year ago
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    |dw:1443153657372:dw|

  3. anonymous
    • one year ago
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    A would be 39 I just can't figure out what B is or how to get it

  4. jim_thompson5910
    • one year ago
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    `I just can't figure out what B is or how to get it` look closely at dan815's drawing

  5. jim_thompson5910
    • one year ago
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    one of those shows X U Y maxed out one of them shows X U Y at it smallest

  6. dan815
    • one year ago
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    |dw:1443154314057:dw|

  7. dan815
    • one year ago
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    think about overlapping circles as them sharing area, when they share the most area, then they have the least total area, when they share the least area, they have the maximum area right

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