Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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Question
A universal​ set, with​ n(U) =
30​,
is partitioned into three​ subsets: A,​ B, and C.  
 
If​ n(B) =
3​⋅n(A),
and​ n(C) =
2​⋅n(B),
find the number of elements in the subset A.
 
 
​n(A) = nothing
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