📘 set theory, logic, algebra
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Sets Logic Variation
1. Problem: Given the universal set $\xi = X \cup Y \cup Z$, with $n(X) = 36$, $n(Y) = 26$, $n(\xi) = 53$, and $n\left[Y' \cap (X \cap Z)'\right] = 6$, find $n[Y' \cap Z]$.
Step 1: