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State whether each of the following sets is well-defined or not. Write your answer in
the space provided before the number.
1. The set of young politicians.
2. The set of types of matter.
3. The set of versatile actress.
4. The set of all oceans of the earth.
5. The set of months containing 31 days.
6. The set of tasty food.
7. The set of planets in our solar system.
8. The set of durable bags.
9. The set of consonants in the English Alphabet
10. The set of even counting numbers.
Answers
Given : Sets
To Find : sets are well-defined or not
Solution:
1. The set of young politicians. - Not well Defined as there is no defined criteria for young politician
2. The set of types of matter. well Defined
3. The set of versatile actress. - Not well Defined as being versatile is not a well defined criteria
4. The set of all oceans of the earth. well Defined
5. The set of months containing 31 days. well Defined
6. The set of tasty food. - Not well Defined One food can be tasty for some one but not for other
7. The set of planets in our solar system. well Defined
8. The set of durable bags. Not well Defined - No defined criteria for durability
9. The set of consonants in the English Alphabet well Defined
10. The set of even counting numbers. well Defined
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