What does "fair" mean?
"As a simple example, let us determine the expected number of heads that we
obtain when flipping a fair coin."
org/wiki/Fair_coin&sa=U&ved=2ahUKEwib5vGo66ngAhVNKFAKHb7hBLkQFjAEegQICBAB&usg=AOvVaw3NlX0mylFtxgoKeyx553zt Best wishes, Joseph
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Tara, please look up the phrase "fair coin" in the link below:
A fair coin is a common concept in discussions of probability based on tossing a coin.
A coin that is not fair is, for example, one that has one side heavier so that it is more likely to land with the lighter side up.
Clive