Let A={2, 4, 6, 8} and B={2, 3, 5, 7, 9}. Compute n(A).

Question

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17
14
5
8
4
1

Please help thank you

Answer 1

so, do you know what n(a) means?

If you do, this cannot be a hard problem.

Answer 2

I don't what n(a) means.

Answer 3

It means the number of elements in the set.

Clearly you have not studied your material.