Select the correct answer. Write the letter on a separate sheet of paper.
1. Which of the following is a well-defined set?
a. A set of beautiful sceneries
b. A set of good basketball players
A set of Philippine Presidents
d. A set of successful leaders.
C.
2. List all the letters in the word "school”. .
a. {s, c, h, 0, 0, 1)
b. {s, c, h, 0, 1)
c. {s, h, 0, 0, 1}
d. {S, C, 0, 1)
3. Which of the following is the symbol of an empty set?
a. n
d. 0
b. U
C.
4. Which of the following is a subset of A= {1,2,3)?
a. {0}
b. {0,1)
c. {1,2}
d. {2,3,4)
5. Given the set of letters in the word "mathematics”, what is the cardinality o
given set?
b. 8
d. 4
C. 6
a 11​​