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QUESTION Calculate the cardinal number of the set Q containing all digits that make up the number = 2,309,585,628.

Sagot :

The cardinal number of a set can be said to be the number of distinct elements in a finite set.

Here, we have the number: 2,309,585,628.

We have the following elements:

2

3

0

9

5

8

6

Some elements occured twice here, no element is to be counted twice.

Thus,

Set Q = {2, 3, 0, 9, 5, 8, 5, 6, 2, 8}

The set Q has 7 elements

The cardinal number of set Q is 7

ANSWER:

n(Q) = 7

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