Whose with Me?

Which of the following is a well-defined set?

• All the hardworking teachers in the school.

• the number of grains in a 5kg pack of rice

• All the honest members of the family.

• All enrolled students in the school.

Which of the following satisfies the statement:

Set of all counting numbers less than 10.

• A={ 0,1,2,3,4,5,6,7,8,9,10}

• B={1,2,3,4,5,6,7,8,9,10}

• C={1,2,3,4,5,6,7,8,9}

• D={0,1,2,3,4,5,6,7,8,9}

The roster form of the set " even numbers between 30 and 40" is _____.

• 30, 32, 34, 36, 38, 40

• Z = {32, 34, 36, 38}

• V= {30, 32, 34, 36, 38, 40}

• 32, 34, 36, 38

Convert the given roster form into set-builder notation form: F={Monday, Tuesday, Wednesday, Thursday, Friday}

• F={ x I x is a day in a week}

• F={x I x is a weekday}

• F={x I x is a holiday}

• F={x I x is a working day}

Which of the following is/are element/s of the given set:

The set of all the months with 30 days

Hint: You may choose more than one answer.

• April

• November

• September

• June

What is the cardinality of the set "the months of the 2nd quarter of the year"?

• 2

• 4

• 1

• 3