Which of the following are sets? Justify your answer.

The collection of all the months of the year whose names begin with the letter M.


Months of the Year = Jan, Feb, March, April, May, June, July, Aug, Sep, Oct, Nov, Dec

Months of the year whose names begin with the letter M are:


• March


• May


As, the collection of all the months of the year whose names begin with the letter M is known and can be counted .i.e. well – defined.


, this is a set.


1