11th sets general info

Set:-well defined collection of objectsis called as sets

signs for sets:-
1)U=universal set
2)∩=intersection set
above set signs will used to represent sets.

we can define any well defined collection with set

for representation of sets there are
3 methods:-
1)venn digram
2)set builder form
3)roster form

venn digram is easier method which is developed by scientist venn so they named it as a venn digram method

set builder form
eg
A={x:xis a group of boys in a class}

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