Answer
$X\cap Y\cap Z$={ }
Work Step by Step
$X\cap Y\cap Z$ is the intersection of the 3 sets. To be included in the intersection, a member must appear in all 3 of the sets.
X={3, 6, 9}
Y={2, 3, 7, 8}
Z={0, 2,4, 6, 8}
Eliminate the members that do not belong to all 3 sets.
$X=\{/\!\!\!3, /\!\!\!6, /\!\!\!9\}$
$Y=\{/\!\!\!2, /\!\!\!3, /\!\!\!7, /\!\!\!8\}$
$Z=\{/\!\!\!0, /\!\!\!2, /\!\!\!4, /\!\!\!6, /\!\!\!8\}$
Since there is no member that appears in all 3 sets, the intersection is an empty set.
