1.what is a well - defined group or a collection of objects that share common characterletics

a.subset b.cardinally c.set d.null set

2.union of sets are ___ elements of two or more set

a.combined b.the same c.number of d.empty

3.which of the following does not belong to the group

a.list of handsome students b.days of week c.the vowets in the english alphabet d.covid-19 varlarit on the philippines

4.what is the cardinallty of the given set a = {1,2,3,4,5,6}

a.5 b.6 c.4 d.3