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What does 3 sets of 30 equal?
90, provided the sets do not overlap.
Can you form 3 more such sets?
No. Because you have chosen not to share the sets, it is not possible to form any more "SUCH" sets.
When are two sets equal?
Two sets are said to be equal when all the elements present in the first set are there in the second set and vice-versa! It even applies for more than two sets. -19yoIndianLad
What are the 2 ways of naming sets?
One way is with curly brackets, for instance {3,4,5,6,7,8}. Another way to name this set would be {(x is a natural number)intersection(3<=x<=8)}
What is a union in mathematics?
The (operation) union in mathematics usually refers to sets of numbers and means the combination of those sets. The best way to describe it is to use an example: Take some set A with the numbers 1, 2, 3, 4, 5 in it and some set B with the numbers 1, 3, 5, 7, 9 in it. The union of these two sets would be the list of all things (list of elements) that is in EITHER set. As long as something is in one of the sets, it's in the union of the sets. Going with the example, the union of these two sets would be 1, 2, 3, 4, 5, 7, 9. Note though that you do NOT count something twice if it's in both sets, it's only counted once.
