Web18 Feb 2024 · The set that consists of all the elements of a specified group is called the universal set and is denoted by the symbol ‘µ,’ also known as ‘mu.’. For two sets P and Q, n (PᴜQ) is the number of items existent in either of the sets P or Q. n (P∩Q) is the number of items existent in both the sets P and Q. n (PᴜQ) = n (P) + (n (Q ... Web18 Feb 2024 · In case of two elements: Where; A = elements belong to set X only B = elements belong to set Y only C = elements belong to bot set X and Y (X Y) F = elements belong to none of the sets X or YB From the above figure, it is clear that n (X) = a + c ; n (Y) = b + c ; n (X ∩ Y) = c; n ( X ∪ Y) = a +b+ c. Total number of elements = a + b + c + f
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