Question 1091886
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Why do not write the condition accurately and correctly, in order for the post itself and each word inside would make sense ????????




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<U>Comment from student</U>: Disjoint subsets A and B are in a universal set U, assume that 
the number &nbsp;n(U)=75, &nbsp;the number n(A)=40, and the number n(B)= 15. &nbsp;Then what is the number for &nbsp;(A' &#8746; B) ? 
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<U>My response</U>: &nbsp;In this case, &nbsp;the subset &nbsp;B is contained in &nbsp;A' and is the part of &nbsp;A'.


&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Therefore, &nbsp;n(A' U B) = n(A') = n(U) - n(A) = 75 - 40 = 35.



Solved and answered.



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It was a pleasure to work with the text that you sent to me this time.



I am very glad that you followed my advise.



Happy learning !!