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5

Step-by-step explanation:

5

Explanation: "The number of distinct elements in a finite set is called its cardinal number. It is denoted as n(A) and read as ‘the number of elements of the set’."

In other words, the cardinal number is the amount of numbers in a set... in this case we have 5 numbers. We have 2,3,4,5, and 6. That is 5 numbers total.

Note: Any repeated numbers don't count as an element.

Example: [2,2,2,3,4,5] this set has only 4 elements. It has 2,3,4, and 5.

So the cardinal number of this set is 4.

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the answer is c)8

step-by-step explanaction: