Complement of a set
In a universal set U={1,2,3,4,5,6,7,8,9} and
A={2,4,6,8}what is A′ (the complement of A)?
{1,3,5,7,9}
If A={1,2,3} and B={3,4,5},
what is A∪BA ?
{1,2,3,4,5}
Intersection of Sets
If X={a,b,c,d} and Y={c,d,e,f} what is X∩YX ?
{c,d,}
Equivalent Sets
Which of the following pairs are equivalent sets?
A. {1,2,3} and {a,b,c,d}
B. {x,y,z} and {5,6,7}
C. {1,2} and {2,3,4}
D. {m,n,o} and {p,q}
B
Which of the following pairs are equal sets?
A. {1,2,3} and {3,2,1}
B. {a,b,c} and {a,b,d}
C. {z, x,y}and {x,y,z}
D. {5,6}} and {6,5}
A , C and D
In a class of 40 students, 28 like Science. If U is the set of all students, and A is the set of students who like Science, how many students are in A′ (those who do not like Science)?
12
In a survey, 15 students like Basketball, 12 like Volleyball, and 5 like both. How many students like Basketball or Volleyball?
22
Intersection (Word Problem)
Out of 30 students, 18 like Math, 15 like English, and 10 like both subjects. How many students like both Math and English?
10
Which statement is true?
A. All equal sets are equivalent, but not all equivalent sets are equal.
B. All equivalent sets are equal, but not all equal sets are equivalent.
C. Equivalent and equal mean the same thing.
D. Equal sets must have different numbers of elements.
A