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26 - Mathematics M1.SE.2 - Set Operations & Notation

⭐ +265 XP
  • ✓determine elements in intersections, unions and complements of sets
  • ✓describe relationships among sets using set notation and symbols (universal, complement, subsets, equal, equivalent, intersection, disjoint, union)
  • ✓apply the result n(A ∪ B) = n(A) + n(B) − n(A ∩ B)
⏱ 0 mins🎯 53 marks
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At a Trinidad school, 25 students play cricket and 18 play football. Surely 25 + 18 = 43 students total? But the principal counts only 35! What about the 8 who play BOTH? That's where set OPERATIONS come in, particularly the formula n(A∪B) = n(A) + n(B) − n(A∩B). Memory Hook / Mnemonic: U-I-C. Union, Intersection, Complement, the three big set operations.
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💡EngageQuestion 3 of 31

Which statement do you think best describes union (∪)?

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💡Engage
At a Trinidad school, 25 students play cricket and 18 play football. Surely 25 + 18 = 43 students total? But the principal counts only 35! What about the 8 who play BOTH? That's where set OPERATIONS come in, particularly the formula n(A∪B) = n(A) + n(B) − n(A∩B). Memory Hook / Mnemonic: U-I-C. Union, Intersection, Complement, the three big set operations.
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