. 3. Ifu={1,2,3,4,5,6,7,8,9,10}
X= {1,2,4,6,7,8,9}
Y= {1,2,3,4,7,9)
and Z= {2,3,4,7,9}
Whatis XnYnZ?
the n stands for intersection

We conclude that:

X∩Y∩Z = {2, 4, 7, 9}

Step-by-step explanation:

What is the intersection of three sets:

We know that the intersection of three given sets represents the largest set which consists of all the elements that are common to all the sets.

What is the symbol of the intersection of the sets:

The intersection of sets is denoted by the symbol '∩'.

Determining the  intersection of the sets:

Given

X= {1,2,4,6,7,8,9}

Y= {1,2,3,4,7,9)

Z= {2,3,4,7,9)

Thus,

X∩Y∩Z = {2, 4, 7, 9}

Therefore, we conclude that:

X∩Y∩Z = {2, 4, 7, 9}