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Let n(A) = 57, n(B) = 24 and n(A n B) = 17, what is n(AUB) *

 

Note: n(S) is the number of elemtns in set S.

 Apr 11, 2020
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n(A union B)  =  n(A) + n(B) - n(A intersect B)

                      =    57  +   24  -  17  =  64

 Apr 11, 2020

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