I will ask my question through an example.

There is 100 man in N. 20 man "have card", 80 man "does not have card".

If i randomly pick 50 man, what is the percentage of "man with cards" in this 50 chosen man?

Thank you for your time & answer!

  • $\begingroup$ What do you mean by percentage? $\endgroup$ – user144410 Nov 8 '18 at 18:49
  • $\begingroup$ more importantly, did you try anything before asking? $\endgroup$ – Alex Nov 8 '18 at 18:51

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