Which of the following is NOT a well-defined set?
A. Multiples of 3 less than 20
B. Lucky numbers less than 30.
C. Composite numbers less than 40.
D. Numbers divisible by 5 less than 50.
Which of the following statements are true about subset?
I. A set with two elements has four subsets.
II. Empty set or null set is a subset of any set.
III. The set itself is not a subset of the given set.
IV. Monday is a subset of the set of days of the week.
A. I and II
B. I and III
C. I and IV
D. II and IV
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Answer:
C a set with two element has four subjects Monday