Question 1 Determine whether the set is well defined. The set of children in fir

Question

Question 1 Determine whether the set is well defined. The set of children in first grade at Maple Elamentary School that are boys. o well defined o not well defined Question 2 Identify the set as finite or infinite. A) Finite o A 78,9,28) B) Infinite o B Question 3 Express the set in roster form. x I x is a whole number between 5 and A) 15,8,7,8B) 15,8,7,8, C)1,7 D)8,7.8,9 o A o D Question 4 Write the set in set-builder notation A) (x | x is the natural number e} B) xlxis a natural number) D) fx is a constant o A o D Question 5 TRUE FALSE. Write 'T if the statement is true and F' if the statement is false Tell whether the statement is true or false. 10 E120, 30, 40, 50, 60 True O False

Explanation / Answer

1. Set of children in first grade at Maple elementary school that are boys.

This set is well defined as we can clearly know who is a boy studying in first grade at Maple elementary school.

2. {7,8,9....28}

Since we can count the number of elements (there are 28 - 7 + 1 = 22 elements in all), the set is finite.

3. {x | x is a whole number between 5 and 9}

(Note: The answer depends whether the set is inclusive or exclusive.)

If the set is inclusive the answer is {5,6,7,8,9} which is given in B.

If the set is exclusice the answer is {6,7,8} which is given in C.

Since the inclusivity is not specified, the most likely answer is C.

4. {6}

In set-builder notation, the set is:

A) {x | x is the natural number 6}

5. The set {20,30,40,50,60} does not contain the element 10.

Therefore, the answer is False.

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